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<p class="caption"><span class="caption-text">Cyrus IMAP</span></p>
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<li class="toctree-l4"><a class="reference internal" href="message-annotations.html">Message Annotations (METADATA)</a></li>
<li class="toctree-l4"><a class="reference internal" href="duplicate-message-delivery-suppression.html">Duplicate Message Delivery Suppression</a></li>
<li class="toctree-l4"><a class="reference internal" href="shared-seen-state.html">Shared Seen State</a></li>
<li class="toctree-l4"><a class="reference internal" href="server-side-filtering.html">Server Side Filtering (Sieve)</a></li>
<li class="toctree-l4"><a class="reference internal" href="event-notifications.html">Event Notifications</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../features.html#calendar-and-contact-dav-collection-management">Calendar and Contact (DAV) Collection Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="caldav-collections.html">CalDAV Collections</a></li>
<li class="toctree-l4"><a class="reference internal" href="dav-components.html">DAV Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="dav-collection-mgmt.html">DAV Collection Management</a></li>
<li class="toctree-l4"><a class="reference internal" href="carddav.html">CardDAV Support</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../features.html#storage">Storage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="mail-spool-partitions.html">Mail Spool Partitions</a></li>
<li class="toctree-l4"><a class="reference internal" href="mailbox-metadata-partitions.html">Mailbox Metadata Partitions</a></li>
<li class="toctree-l4"><a class="reference internal" href="archiving.html">Archiving</a></li>
<li class="toctree-l4"><a class="reference internal" href="quota.html">Quota</a></li>
<li class="toctree-l4"><a class="reference internal" href="single-instance-store.html">Single-Instance Store</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../features.html#load-management">Load Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="server-aggregation.html">Cyrus IMAP Murder (Server Aggregation)</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../overview_and_concepts.html">Concepts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#access-control-lists">Access Control Lists</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#working-with-acls">Working with ACLs</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#sample-acl">Sample ACL</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#access-rights">Access Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#access-control-defaults">Access Control Defaults</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#access-control-identifier-aci">Access Control Identifier (ACI)</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#negative-rights">Negative Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#calculating-a-users-rights">Calculating a Users’ Rights</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#login-authentication">Login Authentication</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#anonymous-login">Anonymous Login</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#plaintext-authentication">Plaintext Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#kerberos-logins">Kerberos Logins</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#shared-secrets-logins">Shared Secrets Logins</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#quotas">Quotas</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#working-with-quotas">Working with Quotas</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#monitor-and-repair">Monitor and Repair</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#supported-quota-types">Supported Quota Types</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#quota-roots">Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#controlling-quota-behavior">Controlling Quota Behavior</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#mail-delivery-behavior">Mail Delivery Behavior</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#quota-warnings-upon-select-when-user-has-d-rights">Quota Warnings Upon Select When User Has <code class="docutils literal notranslate"><span class="pre">d</span></code> Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#quotas-and-partitions">Quotas and Partitions</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#new-mail-notification">New Mail Notification</a></li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#partitions">Partitions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#specifying-partitions-with-create">Specifying Partitions with “create”</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#changing-partitions-with-rename">Changing Partitions with “rename”</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#news">News</a></li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#pop3-server">POP3 Server</a></li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#the-syslog-facility">The syslog facility</a></li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#mail-directory-recovery">Mail Directory Recovery</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#reconstructing-mailbox-directories">Reconstructing Mailbox Directories</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#reconstructing-the-mailboxes-file">Reconstructing the Mailboxes File</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#reconstructing-quota-roots">Reconstructing Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#removing-quota-roots">Removing Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#subscriptions">Subscriptions</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#configuration-directory">Configuration Directory</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#log-directory">Log Directory</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#proc-directory">Proc Directory</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#message-delivery">Message Delivery</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#local-mail-transfer-protocol-lmtp">Local Mail Transfer Protocol (lmtp)</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#single-instance-store">Single Instance Store</a></li>
<li class="toctree-l4"><a class="reference internal" href="../overview_and_concepts.html#duplicate-delivery-suppression">Duplicate Delivery Suppression</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#sieve-a-mail-filtering-language">Sieve, a Mail Filtering Language</a></li>
<li class="toctree-l3"><a class="reference internal" href="../overview_and_concepts.html#cyrus-murder-the-imap-aggregator">Cyrus Murder, the IMAP Aggregator</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../../../setup.html">Setup</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../../developer/compiling.html">Compiling</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../developer/compiling.html#setting-up-dependencies">Setting up dependencies</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#required-build-dependencies">Required Build Dependencies</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#build-dependencies-for-additional-functionality">Build dependencies for additional functionality</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/compiling.html#compile-cyrus">Compile Cyrus</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#default-build-mail-only">Default build: mail only</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#optional-dependencies">Optional dependencies</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#compile">Compile</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html#check">Check</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../installing.html">Installing Cyrus</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#install-cyrus">Install Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#optional-components">Optional Components</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../download/installation/manage-dav.html">HTTP modules</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../download/installation/virus.html">Virus Scanner</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#setting-up-syslog">Setting up syslog</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#create-cyrus-environment">Create Cyrus environment</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#set-up-the-cyrus-mail-user-and-group">Set up the cyrus:mail user and group</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#authentication-with-sasl">Authentication with SASL</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#mail-delivery-from-your-mta">Mail delivery from your MTA</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#protocol-ports">Protocol ports</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#cyrus-config-files">Cyrus config files</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#optional-setting-up-tls-certificates">Optional: Setting up TLS certificates</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html#prepare-ephemeral-run-time-storage-directories">Prepare ephemeral (run-time) storage directories</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#launch-cyrus">Launch Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#send-a-test-email">Send a test email</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#checking-carddav-and-caldav">Checking CardDAV and CalDAV</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../installing.html#troubleshooting">Troubleshooting</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../download/upgrade.html">Upgrading to 3.6</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#preparation">1. Preparation</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../download/upgrade.html#versions-to-upgrade-from">Versions to upgrade from</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../download/upgrade.html#installation-from-tarball">Installation from tarball</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../download/upgrade.html#storage-changes">Storage changes</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../download/upgrade.html#how-are-you-planning-on-upgrading">How are you planning on upgrading?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../download/upgrade.html#do-what-as-who">Do What As Who?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#install-new-3-6-cyrus">2. Install new 3.6 Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#shut-down-existing-cyrus">3. Shut down existing Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#backup-and-copy-existing-data">4. Backup and Copy existing data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#copy-config-files-and-update">5. Copy config files and update</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#upgrade-specific-items">6. Upgrade specific items</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#start-new-3-6-cyrus-and-verify">7. Start new 3.6 Cyrus and verify</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#reconstruct-databases-and-cache">8. Reconstruct databases and cache</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#do-you-want-any-new-features">9. Do you want any new features?</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#upgrade-complete">10. Upgrade complete</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../download/upgrade.html#special-note-for-murder-configurations">Special note for Murder configurations</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../deployment.html">Configuration Guide</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../deployment/deployment_scenarios.html">Deployment Scenarios</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/deployment_scenarios.html#single-server-deployments">Single Server Deployments</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/deployment_scenarios.html#multi-server-deployments">Multi Server Deployments</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/deployment_scenarios.html#cyrus-murder-server-aggregation">Cyrus Murder: Server aggregation</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/deployment_scenarios.html#the-discrete-murder">The Discrete Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/deployment_scenarios.html#the-unified-murder">The Unified Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/deployment_scenarios.html#the-shared-murder">The Shared Murder</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/deployment_scenarios.html#cyrus-replication">Cyrus Replication</a></li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/deployment_scenarios.html#hosted-environments">Hosted Environments</a></li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/databases.html">Databases</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/databases.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/databases.html#file-list">File list</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/databases.html#storage-types">Storage types</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html">Mailbox Creation Distribution</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#selection-mode">Selection Mode</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#special-cases">Special cases</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#partitions-exclusion">Partitions Exclusion</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#partitions-usage-data-reset">Partitions Usage Data Reset</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#mailbox-creation-distribution-through-murder-frontend">Mailbox Creation Distribution Through <code class="docutils literal notranslate"><span class="pre">murder</span> <span class="pre">frontend</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#backends-exclusion">Backends Exclusion</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/mailbox_creation_distribution.html#backends-usage-data-reset">Backends Usage Data Reset</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/known_protocol_limitations.html">Known Protocol Limitations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/known_protocol_limitations.html#pop3-and-mailbox-locking">POP3 and Mailbox Locking</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/known_protocol_limitations.html#cyrus-imap-pop3-implementation">Cyrus IMAP POP3 Implementation</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/authentication_and_authorization.html">Authentication and Authorization</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/authentication_and_authorization.html#client-authentication">Client Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/authentication_and_authorization.html#users-and-mailboxes">Users and Mailboxes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/performance_recommendations.html">Performance Recommendations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/performance_recommendations.html#databases-on-temporary-filesystems">Databases on Temporary Filesystems</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/performance_recommendations.html#certificates">Certificates</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/storage.html">Storage Considerations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#general-notes-on-storage">General Notes on Storage</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#redundancy">Redundancy</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#availability">Availability</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#performance">Performance</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#scalability">Scalability</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#capacity">Capacity</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/storage.html#cost">Cost</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../deployment/supported-platforms.html">Supported Platforms and System Requirements</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../deployment/supported-platforms.html#building-cyrus-imap">Building Cyrus IMAP</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/supported-platforms.html#required-software-components">Required Software Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/supported-platforms.html#recommended-software-components">Recommended Software Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="../deployment/supported-platforms.html#recommended-software-components-enabled-by-default">Recommended Software Components Enabled by Default</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../../../operations.html">Operations</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../../reference/manpages/index.html">Man pages</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../reference/manpages/index.html#configuration-files">(5) Configuration Files</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/configs/cyrus.conf.html"><strong>cyrus.conf</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html"><strong>imapd.conf</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/configs/krb.equiv.html"><strong>krb.equiv</strong></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/manpages/index.html#system-commands">(8) System Commands</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/arbitron.html"><strong>arbitron</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/backupd.html"><strong>backupd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/chk_cyrus.html"><strong>chk_cyrus</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_backups.html"><strong>ctl_backups</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_conversationsdb.html"><strong>ctl_conversationsdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_cyrusdb.html"><strong>ctl_cyrusdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_deliver.html"><strong>ctl_deliver</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_mboxlist.html"><strong>ctl_mboxlist</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ctl_zoneinfo.html"><strong>ctl_zoneinfo</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cvt_cyrusdb.html"><strong>cvt_cyrusdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cvt_xlist_specialuse.html"><strong>cvt_xlist_specialuse</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_backup.html"><strong>cyr_backup</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_buildinfo.html"><strong>cyr_buildinfo</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_dbtool.html"><strong>cyr_dbtool</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_deny.html"><strong>cyr_deny</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_df.html"><strong>cyr_df</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_expire.html"><strong>cyr_expire</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_info.html"><strong>cyr_info</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_ls.html"><strong>cyr_ls</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_synclog.html"><strong>cyr_synclog</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_userseen.html"><strong>cyr_userseen</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyr_virusscan.html"><strong>cyr_virusscan</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyradm.html"><strong>cyradm</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/cyrdump.html"><strong>cyrdump</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/deliver.html"><strong>deliver</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/fetchnews.html"><strong>fetchnews</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/fud.html"><strong>fud</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/httpd.html"><strong>httpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/idled.html"><strong>idled</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/imapd.html"><strong>imapd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ipurge.html"><strong>ipurge</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/lmtpd.html"><strong>lmtpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/lmtpproxyd.html"><strong>lmtpproxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/masssievec.html"><strong>masssievec</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/master.html"><strong>master</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mbexamine.html"><strong>mbexamine</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mbpath.html"><strong>mbpath</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mbtool.html"><strong>mbtool</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mkimap.html"><strong>mkimap</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mknewsgroups.html"><strong>mknewsgroups</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/mupdate.html"><strong>mupdate</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/nntpd.html"><strong>nntpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/notifyd.html"><strong>notifyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/pop3d.html"><strong>pop3d</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/pop3proxyd.html"><strong>pop3proxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/promstatsd.html"><strong>promstatsd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/proxyd.html"><strong>proxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ptdump.html"><strong>ptdump</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ptexpire.html"><strong>ptexpire</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/ptloader.html"><strong>ptloader</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/quota.html"><strong>quota</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/reconstruct.html"><strong>reconstruct</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/rehash.html"><strong>rehash</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/relocate_by_id.html"><strong>relocate_by_id</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/restore.html"><strong>restore</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/sievec.html"><strong>sievec</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/sieved.html"><strong>sieved</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/smmapd.html"><strong>smmapd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/squatter.html"><strong>squatter</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/sync_client.html"><strong>sync_client</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/sync_reset.html"><strong>sync_reset</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/sync_server.html"><strong>sync_server</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/timsieved.html"><strong>timsieved</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/tls_prune.html"><strong>tls_prune</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/translatesieve.html"><strong>translatesieve</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/systemcommands/unexpunge.html"><strong>unexpunge</strong></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/manpages/index.html#user-commands">(1) User Commands</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/arbitronsort.pl.html"><strong>arbitronsort.pl</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/dav_reconstruct.html"><strong>dav_reconstruct</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/httptest.html"><strong>httptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/imtest.html"><strong>imtest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/installsieve.html"><strong>installsieve</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/lmtptest.html"><strong>lmtptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/mupdatetest.html"><strong>mupdatetest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/nntptest.html"><strong>nntptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/pop3test.html"><strong>pop3test</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/sieveshell.html"><strong>sieveshell</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/sivtest.html"><strong>sivtest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/smtptest.html"><strong>smtptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/manpages/usercommands/synctest.html"><strong>synctest</strong></a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../reference/admin.html">Administrator Guide</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../reference/admin.html#architecture">Architecture</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/architecture.html">System Architecture</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/admin.html#management">Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/locations.html">File & Directory Locations</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/ports-sockets.html">Ports and Sockets</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/access-control.html">Access Control</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/quotas.html">Quotas</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/sieve.html">Cyrus Sieve</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/backups.html">Cyrus Backups</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/nntp.html">Cyrus NNTP</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/protlayer.html">Cyrus Prot Layer</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/sop.html">Standard Operating Procedures</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/eventsource.html">Cyrus Event Source</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/monitoring.html">Monitoring</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/config-mailboxdistribution.html">Mailbox Distribution</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/murder/murder.html">Cyrus Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/nginx-proxy.html">HOWTO: Using an NGINX IMAP Proxy</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/admin/tweaking.html">Tweaking Cyrus IMAP</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../reference/faq.html">Frequently Asked Questions</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../reference/faq.html#features">Features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/feature-database-backend.html">Which database backend should I use for which databases?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/feature-duplicate-delivery.html">Duplicate Delivery Suppression</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/faq.html#installation-problems">Installation Problems</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/install-compilationerrors.html">Compilation errors about kssl.h and krb5.h on Red Hat Linux/Fedora</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/install-install-help.html">Help! There must be an easier way to get all this going…</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/install-linkerwarnings.html">OpenSSL Version Mismatches</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/faq.html#common-feature-requests">Common Feature Requests</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/r-murder-ha.html">Does the Cyrus Murder support High Availability configurations?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/r-pop3-logging.html">Can I configure pop3d to log amount and size of messages fetched by user?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/r-publicssharedfolders.html">How can I make CyrusSieve work with public shared folders?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/r-subfolders.html">Can I have subfolders not appear under INBOX?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/faq.html#common-operational-questions">Common Operational Questions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-acls.html">How do I view ACLs on a mailbox?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-annotations.html">What annotations are available?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-configdir-tempfs.html">Is it safe to put <configdirectory>/proc and <configdirectory>/lock on a tmpfs filesystem?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-coredump.html">How to enable core dumps</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-delete-mailbox.html">Why can I not delete a mailbox as an admin user?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-deleted-expired-expunged-purged.html">When is What … Deleted, Expired, Expunged or Purged?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-deliverdb-size.html">Why is deliver.db so large?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-freezes.html">I have multiple imapd-SERVICES configured and experience occasional freezes when I try to log in!</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-gdb.html">How to run gdb on Cyrus components</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-mailbox-doesnotexist.html">Cyrus delivers claims that the mailbox does not exist</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-mixedcase.html">Why is mail being rejected with No Mailbox found due to MiXed CaSe incoming e-mail?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-otherdatabases.html">Can I use MySQL (or another SQL database) as the primary mail store?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-pop3slow.html">Why do POP3 connections take so long, but once the connection is established all is well?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-reconstruct.html">Why does reconstruct -m not work?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-sharedfilesystem-gpfs.html">Shared File Systems GPFS for high availability</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-telemetry.html">How to enable telemetry</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-toomanyprocesses.html">The process count keeps growing!</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-unable-join-environment.html">“unable to join environment” error</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/o-vacation-mailfrom.html">Why does Cyrus set the MAIL FROM address of the sender of vacation responses to ‘<>’?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../reference/faq.html#common-interoperability-problems">Common Interoperability Problems</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/interop-8bit.html">Why does Cyrus reject 8-bit characters in the headers of my messages?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/interop-barenewlines.html">Why does Cyrus reject messages with “bare newlines”?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/interop-sieve-exim.html">How do I get Cyrus Sieve to play nice with Exim?</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../reference/faqs/interop-slow-delivery.html">Why does mail delivery go slow or hang sometimes?</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../../../developers.html">Developers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../../../contribute.html">We need your help</a></li>
<li class="toctree-l2"><a class="reference internal" href="../../developer/documentation.html">Contribute docs</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#documentation-tools">Documentation Tools</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#building-the-files">Building the files</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#submitting-updates">Submitting updates</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#using-github-pull-requests">Using GitHub pull requests</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#patches-through-the-mailing-list">Patches through the mailing list</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#special-tags">Special Tags</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#rfc">rfc</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#cyrusman">cyrusman</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#imap-current-stable-version">imap_current_stable_version</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/documentation.html#conventions-man-pages">Conventions: Man Pages</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#synopsis">Synopsis</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/documentation.html#examples">Examples</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../developer.html">Contribute code and tests</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../developer.html#getting-started">Getting Started</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/process.html">Development Process</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/overview.html">Overview of Cyrus development environment</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/github-guide.html">GitHub guide</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/compiling.html">Compiling</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../installing.html">Installing Cyrus</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/developer-testing.html">Developer Test Environment</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/jmap.html">JMAP support</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer.html#system-files-and-databases">System files and Databases</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/namespaces.html">Namespaces: a developer view</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer.html#resources">Resources</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/libraries.html">Developer Libraries</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer.html#releasing">Releasing</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/releasing.html">Releasing Cyrus IMAP</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/ancient-releasing.html">Releasing new builds of ancient Cyrus IMAP versions</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../developer/cyrusworks.html">Cyrus.Works</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../developer/cyrusworks.html#about-cyrus-works">About Cyrus Works</a></li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/cyrusworks.html#how-it-works">How it works</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../../developers.html#cyrus-internals">Cyrus Internals</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../../developer/API.html">Cyrus APIs</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/API/cyrusdb.html">CyrusDB API</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/API/cyrusdb2.html">cyrusdb API</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/API/index-api.html">Index API</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/API/mailbox-api.html">Mailbox API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/thoughts.html">Thoughts & Notes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/backup.html">Notes for backup implementation</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/bytecode.html">Cyrus IMAP Server: Sieve Bytecode</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/caldav_scheduling_flowchart.html">Cyrus CalDAV Scheduling Flowchart</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/improved_mboxlist_sort.html">Enabling improved_mboxlist_sort</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/notes.html">Cyrus IMAP Server: Notes</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/thoughts/prot-events.html">Cyrus IMAP Server: Prot Events</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../../developer/guidance.html">Guidance for Developers</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../../developer/guidance/hacking.html">Cyrus IMAP Server: Hacking</a></li>
<li class="toctree-l4"><a class="reference internal" href="../../developer/guidance/internationalization.html">Cyrus IMAP Server: Internationalization</a></li>
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<div class="section" id="mailbox-distribution">
<span id="imap-features-mailbox-distribution"></span><h1>Mailbox Distribution<a class="headerlink" href="#mailbox-distribution" title="Permalink to this headline">¶</a></h1>
<p>Prior to Cyrus IMAP version 2.5.0, when creating a mailbox, should no
target partition have been specified, the mailbox is either created on:</p>
<ul class="simple">
<li><p>the configured <code class="docutils literal notranslate"><span class="pre">defaultserver</span></code>, or</p></li>
<li><p>the server that is found to have the most free disk space, and</p></li>
<li><p>the configured <code class="docutils literal notranslate"><span class="pre">defaultpartition</span></code>, or</p></li>
<li><p>the most fitting partition if <code class="docutils literal notranslate"><span class="pre">defaultpartition</span></code> is not
configured.</p></li>
</ul>
<p>New configuration options are available since Cyrus IMAP 2.5.0, that
allow more weighted and better balanced backend and partition
selection.</p>
<div class="section" id="partition-selection-mode">
<h2>Partition Selection Mode<a class="headerlink" href="#partition-selection-mode" title="Permalink to this headline">¶</a></h2>
<p>Among the partitions, how the most fitting one is selected depends on
the configured selection mode, using the <code class="docutils literal notranslate"><span class="pre">partition_select_mode</span></code>
setting in <a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html#std-cyrusman-imapd.conf-5">imapd.conf(5)</a>.</p>
<p class="rubric">Available Selection Modes</p>
<div class="sidebar">
<p class="sidebar-title">Example Scenario for Selection Modes</p>
<p>Suppose that the partitions configured are:</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 33%" />
<col style="width: 27%" />
<col style="width: 24%" />
<col style="width: 15%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Partition</p></th>
<th class="head"><p>Total</p></th>
<th class="head"><p>Free</p></th>
<th class="head"><p>%</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">part1</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>400 GB</p></td>
<td><p>40%</p></td>
</tr>
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">part2</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>600 GB</p></td>
<td><p>60%</p></td>
</tr>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">part3</span></code></p></td>
<td><p>100 GB</p></td>
<td><p>30 GB</p></td>
<td><p>30%</p></td>
</tr>
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">part4</span></code></p></td>
<td><p>100 GB</p></td>
<td><p>70 GB</p></td>
<td><p>70%</p></td>
</tr>
</tbody>
</table>
</div>
<ul>
<li><p><strong>random</strong></p>
<p>Choice is (pseudo-)random. Each partition has the same probability
of being selected.</p>
</li>
<li><p><strong>freespace-most</strong></p>
<p>The partition which has the most absolute free space (counted in KiB
units) is selected.</p>
<p>In the example scenario, <code class="docutils literal notranslate"><span class="pre">part2</span></code> would be selected as most
fitting, since 600 GB of free space is the biggest of all
partitions.</p>
</li>
<li><p><strong>freespace-percent-most</strong></p>
<p>The partition which has the most relative free space (counted in
percentiles) is selected.</p>
<p>In the example scenario, <code class="docutils literal notranslate"><span class="pre">part4</span></code> would be selected as most
fitting, since 70% of free space is the biggest of all partitions.</p>
</li>
<li><p><strong>freespace-percent-weighted</strong></p>
<p>For each partition, the percentage of free space is its weight. Then
a weighted choice is performed to select one of those partitions.</p>
<p>As such, the more free space the partition has, the higher its
chances to be selected.</p>
<p>In the example scenario, the weight of each partition would be:</p>
<ul class="simple">
<li><p>40 for <code class="docutils literal notranslate"><span class="pre">part1</span></code></p></li>
<li><p>60 for <code class="docutils literal notranslate"><span class="pre">part2</span></code></p></li>
<li><p>30 for <code class="docutils literal notranslate"><span class="pre">part3</span></code></p></li>
<li><p>70 for <code class="docutils literal notranslate"><span class="pre">part4</span></code></p></li>
</ul>
<p>The sum of all weights being 200, the probability for each
partition to be selected as most fitting is:</p>
<ul class="simple">
<li><p>20% for <code class="docutils literal notranslate"><span class="pre">part1</span></code></p></li>
<li><p>30% for <code class="docutils literal notranslate"><span class="pre">part2</span></code></p></li>
<li><p>15% for <code class="docutils literal notranslate"><span class="pre">part3</span></code></p></li>
<li><p>35% for <code class="docutils literal notranslate"><span class="pre">part4</span></code></p></li>
</ul>
<p>Out of 20 (hypothetically empty) mailboxes to be created,
chances are:</p>
<ul class="simple">
<li><p>4 are created on <code class="docutils literal notranslate"><span class="pre">part1</span></code></p></li>
<li><p>6 are created on <code class="docutils literal notranslate"><span class="pre">part2</span></code></p></li>
<li><p>3 are created on <code class="docutils literal notranslate"><span class="pre">part3</span></code></p></li>
<li><p>7 are created on <code class="docutils literal notranslate"><span class="pre">part4</span></code></p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>In <code class="docutils literal notranslate"><span class="pre">freespace-percent-weighted</span></code> mode, partitions percentage
usages converge towards 100%. So if they have different usages,
those differences will stay and only really diminish upon
reaching 100% of usage.</p>
<p>You may also observe growing differences between partitions
usage when those partitions do not have the same total disk
space.</p>
</div>
</li>
</ul>
<p><strong>freespace-percent-weighted-delta</strong></p>
<blockquote>
<div><p>As for <code class="docutils literal notranslate"><span class="pre">freespace-percent-weighted</span></code>, a weight is associated to
each partition. It is computed as follows:</p>
<div class="math notranslate nohighlight">
\[free - leastfree + 0.5\]</div>
<p>Then a weighted choice is performed to select one of those
partitions.</p>
<p>As such, considering the percentages of usage, the more the
partition is lagging behind the most used partition (which is the
one with the lowest <strong>percentage</strong> of free space), the higher its
chances are to be selected.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The added 0.5 in partitions weight causes the selection to get
smoother the more partitions get close to each other.</p>
</div>
<p>In the example scenario, the weight of each partition would be:</p>
<ul class="simple">
<li><p>For <code class="docutils literal notranslate"><span class="pre">part1</span></code>: <span class="math notranslate nohighlight">\(40 - 30 + 0.5 = 10.5\)</span></p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part2</span></code>: <span class="math notranslate nohighlight">\(60 - 30 + 0.5 = 30.5\)</span></p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part3</span></code>: <span class="math notranslate nohighlight">\(30 - 30 + 0.5 = 00.5\)</span></p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part4</span></code>: <span class="math notranslate nohighlight">\(70 - 30 + 0.5 = 40.5\)</span></p></li>
</ul>
<p>The sum of all weights amounting to 82, the probability for each
partition to be selected as most fitting would be:</p>
<ul class="simple">
<li><p>For <code class="docutils literal notranslate"><span class="pre">part1</span></code>: 12.8%</p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part2</span></code>: 37.2%</p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part3</span></code>: 00.6%</p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">part4</span></code>: 49.4%</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>In <code class="docutils literal notranslate"><span class="pre">freespace-percent-weighted-delta</span></code> mode, partitions
percentage usages converge towards the most used one, after
which partitions usages grow equally.</p>
</div>
</div></blockquote>
<div class="section" id="special-cases">
<h3>Special Cases<a class="headerlink" href="#special-cases" title="Permalink to this headline">¶</a></h3>
<div class="section" id="q-what-happens-when-two-partitions-are-equal-as-most-fitting">
<h4>Q: What happens when two partitions are equal as most fitting?<a class="headerlink" href="#q-what-happens-when-two-partitions-are-equal-as-most-fitting" title="Permalink to this headline">¶</a></h4>
<p>Suppose you are using the <code class="docutils literal notranslate"><span class="pre">freespace-most</span></code> selection mode, that two
(or more) partitions have the same free size, and that this freespace
happens to be the biggest one of all configured partitions.</p>
<p>In that case, only one of those partitions will be selected. You may not
know in advance which one will be: it depends of the order in which
configured partitions are stored in memory (<code class="docutils literal notranslate"><span class="pre">hashtable</span></code>). In
particular, it may not be the first one that appears listed in your
<a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html#std-cyrusman-imapd.conf-5">imapd.conf(5)</a> configuration file.</p>
<p>Also note that since the selected partition will now have less free
space, it shall not be seen as most fitting next time.</p>
</div>
<div class="section" id="q-what-happens-when-two-partitions-point-to-the-same-device">
<h4>Q: What happens when two partitions point to the same device?<a class="headerlink" href="#q-what-happens-when-two-partitions-point-to-the-same-device" title="Permalink to this headline">¶</a></h4>
<p>Suppose you are using the <code class="docutils literal notranslate"><span class="pre">freespace-most</span></code> or
<code class="docutils literal notranslate"><span class="pre">freespace-percent-most</span></code> selection mode, and that two (or more)
partitions actually point to a different directory on the same
filesystem.</p>
<p>In that case, only one of those partitions will be checked, as if the
others were not configured. Cyrus IMAP uses the device id of the
partition hierarchy for this. You may not know in advance which one will
be: it depends of the order in which configured partitions are stored in
memory (<code class="docutils literal notranslate"><span class="pre">hashtable</span></code>). In particular, it may not be the first one that
appears listed in your <a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html#std-cyrusman-imapd.conf-5">imapd.conf(5)</a> configuration file.</p>
</div>
</div>
<div class="section" id="excluding-partitions">
<h3>Excluding Partitions<a class="headerlink" href="#excluding-partitions" title="Permalink to this headline">¶</a></h3>
<p><strong>partition_select_exclude</strong></p>
<blockquote>
<div><p>Partitions listed in the <code class="docutils literal notranslate"><span class="pre">partition_select_exclude</span></code> setting in
<a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html#std-cyrusman-imapd.conf-5">imapd.conf(5)</a> are permanently excluded from being
selected.</p>
<p>Listed partition’s names are separated by spaces and/or commas. Only
configured partition names (and not paths) are expected.</p>
<p>With the following configuration in <a class="reference internal" href="../../reference/manpages/configs/imapd.conf.html#std-cyrusman-imapd.conf-5">imapd.conf(5)</a>,
<code class="docutils literal notranslate"><span class="pre">parta</span></code> and <code class="docutils literal notranslate"><span class="pre">partb</span></code> would be permanently excluded from being
selected:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">partition</span><span class="o">-</span><span class="n">part1</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">part1</span>
<span class="n">partition</span><span class="o">-</span><span class="n">part2</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">part2</span>
<span class="n">partition</span><span class="o">-</span><span class="n">part3</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">part3</span>
<span class="n">partition</span><span class="o">-</span><span class="n">part4</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">part4</span>
<span class="n">partition</span><span class="o">-</span><span class="n">parta</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">parta</span>
<span class="n">partition</span><span class="o">-</span><span class="n">partb</span><span class="p">:</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">partb</span>
<span class="n">partition_mode_exclude</span><span class="p">:</span> <span class="n">parta</span> <span class="n">partb</span>
</pre></div>
</div>
</div></blockquote>
<p><strong>partition_select_soft_usage_limit</strong></p>
<blockquote>
<div><p>When using a selection mode other than <code class="docutils literal notranslate"><span class="pre">random</span></code>, partitions are
automatically excluded if their usage percentage is beyond the
<code class="docutils literal notranslate"><span class="pre">partition_select_soft_usage_limit</span></code> integer setting.</p>
<p>If all partitions are beyond the configured value, this feature is
automatically deactivated. A partition is thus selected as if the
setting was not configured.</p>
<p>In the example scenario, setting <code class="docutils literal notranslate"><span class="pre">partition_mode_soft_usage_limit</span></code>
to <code class="docutils literal notranslate"><span class="pre">50</span></code> would exclude partitions <code class="docutils literal notranslate"><span class="pre">part1</span></code> and <code class="docutils literal notranslate"><span class="pre">part3</span></code> since
their disk usages are 60% and 70% respectively.</p>
<p>But setting the option to <code class="docutils literal notranslate"><span class="pre">20</span></code> would have no immediate effect on
the selection of a partition, since the usage of all partitions is
beyond 20%.</p>
</div></blockquote>
<div class="admonition important">
<p class="admonition-title">Important</p>
<p><strong>Exclusion is not absolute</strong></p>
<p>Partitions are only excluded when creating a new user mailbox
according to the configured selection mode.</p>
<p>If you explicitly specify an excluded partition, the mailbox will
be created on that partition.</p>
<p>Mailboxes previously created on such partitions are of course still
accessible, and subfolders are by default still created on the same
partition as the parent folder.</p>
</div>
</div>
<div class="section" id="partition-s-usage-information-reset">
<h3>Partition’s Usage Information Reset<a class="headerlink" href="#partition-s-usage-information-reset" title="Permalink to this headline">¶</a></h3>
<p>By default, partition’s usage information is retrieved only once – when
the service first initializes.</p>
<p>If you tend to use the same service instance for a long lapse of time
and performs a large amount of mailbox creations, it may be useful to
configure the <code class="docutils literal notranslate"><span class="pre">partition_select_usage_reinit</span></code> setting so that
each partition’s usage information is refreshed after the configured
number of creation requests.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This only concerns selection modes other than <cite>random`</cite>.</p>
</div>
</div>
</div>
<div class="section" id="backend-selection-mode-cyrus-imap-murder">
<h2>Backend Selection Mode (Cyrus IMAP Murder)<a class="headerlink" href="#backend-selection-mode-cyrus-imap-murder" title="Permalink to this headline">¶</a></h2>
<p>Upon creating a user mailbox, if the target server is not given as
extra parameter, the mailbox is created on either;</p>
<ul class="simple">
<li><p>the configured <code class="docutils literal notranslate"><span class="pre">defaultserver</span></code> backend</p></li>
<li><p>the most fitting backend (partition) among the servers listed in the
<code class="docutils literal notranslate"><span class="pre">serverlist</span></code> setting, if <code class="docutils literal notranslate"><span class="pre">defaultserver</span></code> is not configured.</p></li>
</ul>
<p class="rubric">Related Settings</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">serverlist_select_mode</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">serverlist_select_usage_reinit</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">serverlist_select_soft_usage_limit</span></code></p></li>
</ul>
<div class="section" id="available-selection-modes-on-frontend">
<h3>Available Selection Modes on Frontend<a class="headerlink" href="#available-selection-modes-on-frontend" title="Permalink to this headline">¶</a></h3>
<p><strong>random</strong></p>
<blockquote>
<div><p>The selection is (pseudo-)random. Each backend has the same
probability of being selected.</p>
</div></blockquote>
<div class="sidebar">
<p class="sidebar-title">Example Scenario for Selection Modes</p>
<p>Suppose that the partitions configured are:</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 21%" />
<col style="width: 26%" />
<col style="width: 21%" />
<col style="width: 21%" />
<col style="width: 12%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Backend</p></th>
<th class="head"><p>Partition</p></th>
<th class="head"><p>Total</p></th>
<th class="head"><p>Free</p></th>
<th class="head"><p>%</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">be1</span></code></p></td>
<td></td>
<td><p>2000 GB</p></td>
<td><p>1000 GB</p></td>
<td><p>50%</p></td>
</tr>
<tr class="row-odd"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part1</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>500 GB</p></td>
<td><p>50%</p></td>
</tr>
<tr class="row-even"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part2</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>500 GB</p></td>
<td><p>50%</p></td>
</tr>
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">be2</span></code></p></td>
<td></td>
<td><p>2000 GB</p></td>
<td><p>900 GB</p></td>
<td><p>45%</p></td>
</tr>
<tr class="row-even"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part1</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>200 GB</p></td>
<td><p>20%</p></td>
</tr>
<tr class="row-odd"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part2</span></code></p></td>
<td><p>1000 GB</p></td>
<td><p>700 GB</p></td>
<td><p>70%</p></td>
</tr>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">be3</span></code></p></td>
<td></td>
<td><p>200 GB</p></td>
<td><p>110 GB</p></td>
<td><p>55%</p></td>
</tr>
<tr class="row-odd"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part1</span></code></p></td>
<td><p>100 GB</p></td>
<td><p>30 GB</p></td>
<td><p>30%</p></td>
</tr>
<tr class="row-even"><td></td>
<td><p><code class="docutils literal notranslate"><span class="pre">part2</span></code></p></td>
<td><p>100 GB</p></td>
<td><p>80 GB</p></td>
<td><p>80%</p></td>
</tr>
</tbody>
</table>
</div>
<p><strong>freespace-most</strong></p>
<blockquote>
<div><p>The backend which has the most absolute free space (counted in KiB
units) is selected.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The considered free space is the sum of the free space on all
available partitions on the backend.</p>
</div>
<p>In the example scenario, <code class="docutils literal notranslate"><span class="pre">be1</span></code> would be selected as most fitting,
since 1000 GB of free space is the most of all backends.</p>
</div></blockquote>
<p><strong>freespace-percent-most</strong></p>
<blockquote>
<div><p>On each backend, only the partition with the most percentage of free
space is considered. The selected backend is the one whose partition
has the highest percentage of free space.</p>
<p>In the example scenario, <code class="docutils literal notranslate"><span class="pre">be3</span></code> would be selected as most fitting,
since it has a partition with 80% of free space which is the
highest of all backends.</p>
</div></blockquote>
<p><strong>freespace-percent-weighted</strong></p>
<blockquote>
<div><p>On each backend, only the partition with the most percentage of free
space is considered: this is the backend weight. Then a weighted
choice is performed to select one of the backends.</p>
<p>In the example scenario, the weight of each backend would be:</p>
<ul class="simple">
<li><p>50 for <code class="docutils literal notranslate"><span class="pre">be1</span></code></p></li>
<li><p>70 for <code class="docutils literal notranslate"><span class="pre">be2</span></code></p></li>
<li><p>80 for <code class="docutils literal notranslate"><span class="pre">be3</span></code></p></li>
</ul>
<p>The sum of all weights being 200, the probability for each backend
to be selected as most fitting would be:</p>
<ul class="simple">
<li><p>25% for <code class="docutils literal notranslate"><span class="pre">be1</span></code></p></li>
<li><p>35% for <code class="docutils literal notranslate"><span class="pre">be2</span></code></p></li>
<li><p>40% for <code class="docutils literal notranslate"><span class="pre">be3</span></code></p></li>
</ul>
</div></blockquote>
<p><strong>freespace-percent-weighted-delta</strong></p>
<blockquote>
<div><p>On each backend, only the partition with the most percentage of free
space is considered.</p>
<p>Like with <code class="docutils literal notranslate"><span class="pre">freespace-percent-weighted</span></code>, a weight is associated to
each backend. It is computed as follows:</p>
<div class="math notranslate nohighlight">
\[free - leastfree + 0.5\]</div>
<p>Then a weighted choice is performed to select one of the backends.</p>
<p>In the example scenario, the weight of each backend would be:</p>
<ul class="simple">
<li><p>For <code class="docutils literal notranslate"><span class="pre">be1</span></code>: <span class="math notranslate nohighlight">\(50 - 50 + 0.5 = 0.5\)</span></p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">be2</span></code>: <span class="math notranslate nohighlight">\(70 - 50 + 0.5 = 20.5\)</span></p></li>
<li><p>For <code class="docutils literal notranslate"><span class="pre">be3</span></code>: <span class="math notranslate nohighlight">\(80 - 50 + 0.5 = 30.5\)</span></p></li>
</ul>
<p>Then the probability for each backend to be selected as most fitting would be:</p>
<ul class="simple">
<li><p>1.0% for <code class="docutils literal notranslate"><span class="pre">be1</span></code></p></li>
<li><p>39.8% for <code class="docutils literal notranslate"><span class="pre">be2</span></code></p></li>
<li><p>59.2% for <code class="docutils literal notranslate"><span class="pre">be3</span></code></p></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="excluding-backends">
<h3>Excluding Backends<a class="headerlink" href="#excluding-backends" title="Permalink to this headline">¶</a></h3>
<p>When using a selection mode other than <code class="docutils literal notranslate"><span class="pre">random</span></code>, backends are
automatically excluded if their considered usage percentage is beyond
the <code class="docutils literal notranslate"><span class="pre">serverlist_select_soft_usage_limit</span></code> integer setting.</p>
</div>
<div class="section" id="backend-s-usage-information-reset">
<h3>Backend’s Usage Information Reset<a class="headerlink" href="#backend-s-usage-information-reset" title="Permalink to this headline">¶</a></h3>
<p>By default backends usage data are retrieved only once upon service
initialization.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This only concerns selection modes other than <code class="docutils literal notranslate"><span class="pre">random</span></code>.</p>
</div>
<p>If you tend to use the same service instance for a long lapse of time
and performs a large amounts of mailbox creations, it may be useful to
configure the <code class="docutils literal notranslate"><span class="pre">serverlist_select_usage_reinit</span></code> so that the backend’s
disk usage information is refreshed after the configured number of
creation requests.</p>
<p>Back to <a class="reference internal" href="../features.html#imap-features"><span class="std std-ref">Features</span></a></p>
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