Upgrade Dovecot from 2.2.x to 2.3.x

Dovecot 2.3 breaks some backward compatible, and here's a short tutorial to convert your Dovecot 2.2 config file to fully work with Dovecot 2.3.

For more details, please read Dovecot wiki page: Upgrading Dovecot v2.2 to v2.3.

Attention

Dovecot 2.3 uses TLSv1 as minimal SSL protocol, if you prefer TLSv1.1 or TLSv1.2, please set the protocol version in parameter ssl_min_protocol like below:

ssl_min_protocol = TLSv1.2

Upgrade Dovecot on Linux/OpenBSD

Run commands below as root user:

perl -pi -e 's/^ssl_protocols/#${1}/g' /etc/dovecot/dovecot.conf perl -pi -e 's#^(mail_plugins.*) stats(.*)#${1} old_stats${2}#g' /etc/dovecot/dovecot.conf perl -pi -e 's#imap_stats#imap_old_stats#g' /etc/dovecot/dovecot.conf perl -pi -e 's#service stats#service old-stats#g' /etc/dovecot/dovecot.conf perl -pi -e 's#fifo_listener stats-mail#fifo_listener old-stats-mail#g' /etc/dovecot/dovecot.conf perl -pi -e 's#stats_refresh#old_stats_refresh#g' /etc/dovecot/dovecot.conf perl -pi -e 's#stats_track_cmds#old_stats_track_cmds#g' /etc/dovecot/dovecot.conf perl -pi -e 's#(postmaster_address.*)##g' /etc/dovecot/dovecot.conf

On RHEL/CentOS, please add new setting in /etc/dovecot/dovecot.conf:

ssl_dh = </etc/pki/tls/dh2048_param.pem

On Debian/Ubuntu/OpenBSD, please add new setting in /etc/dovecot/dovecot.conf:

ssl_dh = </etc/ssl/dh2048_param.pem

Upgrade Dovecot on FreeBSD

Run commands below as root user:

perl -pi -e 's/^ssl_protocols/#${1}/g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#^(mail_plugins.*) stats(.*)#${1} old_stats${2}#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#imap_stats#imap_old_stats#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#service stats#service old-stats#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#fifo_listener stats-mail#fifo_listener old-stats-mail#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#stats_refresh#old_stats_refresh#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#stats_track_cmds#old_stats_track_cmds#g' /usr/local/etc/dovecot/dovecot.conf perl -pi -e 's#(postmaster_address.*)##g' /usr/local/etc/dovecot/dovecot.conf

Add new setting in /etc/dovecot/dovecot.conf:

ssl_dh = </etc/ssl/dh2048_param.pem