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= Prerequisites =
Depending on the mail transport agent (MTA) chosen, the following packages are
required for this software to work on Debian systems:
Exim:: exim4-daemon-heavy
Postfix:: postfix postfix-ldap
The software itself requires the following packages:
Python:: python
pytz:: python-tz
If the [[../DatabaseStore|database store]] is used, the following packages are required:
PostgreSQL:: postgresql-9.4 (version may vary between releases)
psycopg2:: python-psycopg2
To provide localised messages:
gettext:: gettext
To update free/busy details periodically, the following software is
recommended:
Cron:: cron
The management Web interface requires the following packages:
Apache:: apache2
Babel:: python-babel
Although not necessarily within the scope of the deployment of this software,
the following mail storage solutions would be used to receive and hold
messages:
Cyrus:: cyrus-imapd
Dovecot:: dovecot-imapd dovecot-ldap dovecot-lmtpd
Some test programs and the configuration helper tool need additional programs
provided by other packages:
envsubst:: gettext-base
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