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<section id="cyrus-imap-2-3-10-release-notes">
<h1>Cyrus IMAP 2.3.10 Release Notes<a class="headerlink" href="#cyrus-imap-2-3-10-release-notes" title="Permalink to this heading"></a></h1>
<p>Changes to the Cyrus IMAP Server since 2.3.9</p>
<ul class="simple">
<li><p>Added support for "delayed" delete, in which mailboxes are renamed to a special admin-only "deleted" hierarchy at the time of the DELETE (hiding them from the client), rather than immediately removing them from the filesystem. This allows messages/mailboxes to be recovered by the admin in case of user error. The mailboxes and messages can be removed at a later time by cyr_expire. The new delete_mode and deletedprefix options in imapd.conf controls whether deletes are "immediate" or "delayed" and the mailbox hierarchy for "delayed" deletes. -- courtesy of David Carter and FastMail.fm.</p></li>
<li><p>Fixed the special case of RENAMEing an Inbox, so that it doesn't keep the same mailbox uniqueid, thus allowing it to replicate properly (seen state is still preserved).</p></li>
<li><p>Disabled Nagle's algorithm in sync_client and sync_server to increase the throughput of the replication protocol. -- courtesy of Wes Craig.</p></li>
<li><p>Added support for a shared Seen flag on messages (must be enabled on a per-mailbox basis with the /vendor/cmu/cyrus-imapd/sharedseen mailbox annotation.</p></li>
<li><p>Added -g and -G options to reconstruct -- courtesy of David Carter.</p></li>
<li><p>Added SETUIDVALIDITY command to the replication protocol -- courtesy of David Carter.</p></li>
<li><p>Finally fixed (again?) alignment issues on 64-bit SPARC.</p></li>
<li><p>Changed message GUIDs used by replication to be the SHA1 hash of the messages -- based on work of David Carter and Fastmail.fm.</p></li>
<li><p>Improve the performance of commands that operate on sequence-sets. The sequence-set is now parsed only once, and the commands operate on a sorted list of seq-ranges.</p></li>
<li><p>Added new cyr_synclog utility for adding events to the replication log -- courtesy of Fastmail.fm.</p></li>
<li><p>Added support for PCRE library -- courtesy of Fastmail.fm.</p></li>
<li><p>Added support for disabling duplicate delivery suppression on a per-folder basis with the /vendor/cmu/cyrus-imapd/duplicatedeliver mailbox annotation -- courtesy of Fastmail.fm.</p></li>
<li><p>Fixed miscellaneous bugs and build issues.</p></li>
</ul>
<p><a class="reference internal" href="../index.html#imap-release-notes-2-3"><span class="std std-ref">Cyrus IMAP 2.3 Releases</span></a></p>
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