Dovecot

Dovecot is an IMAP and POP3 server, and is used on Wikimedia's IMAP server sanger.

Dovecot can be installed from the Ubuntu dovecot-imap package, which also pulls in dovecot-common.

Configuration

The configuration file resides in /etc/dovecot/dovecot.conf. Dovecot has very reasonable defaults, so not many settings need to be changed.

Main configuration

Protocols

We only support IMAP over SSL/TLS:

protocols = imaps

Mail location

As we have a unified virtual users IMAP setup, the Maildir directory can be determined using a template:

mail_location = maildir:/var/vmail/%d/%n

Mail extra groups

The Ubuntu default configuration has group mail added by default; this is not needed in our configuration.

#mail_extra_groups = mail

Maildir optimizations

When copying a message, do it with hard links whenever possible. This makes the performance much better, and it's unlikely to have any side effects.

maildir_copy_with_hardlinks = yes

See also

• Mail for Dovecot LDA configuration, and the rest of the mail system.