Upgrading Dovecot v2.2 to v2.3
==============================

Settings changes
----------------

 * director_doveadm_port setting removed. Name the inet_listener doveadm { .. }
   instead.
 * mdbox_purge_preserve_alt setting removed. It's always assumed to be "yes"
   now.

Setting default changes
-----------------------

 * mdbox_rotate_size=2M -> 10M

Diffie-Heffman parameters for SSL
---------------------------------

 * ssl-parameters.dat file is now obsolete. You should use ssl_dh setting
   instead:'ssl_dh=</etc/dovecot/dh.pem'
    * You can convert an existing ssl-parameters.dat to dh.pem:

      ---%<-------------------------------------------------------------------
      dd if=/var/lib/dovecot/ssl-parameters.dat bs=1 skip=88 | openssl dh
      -inform der > /etc/dovecot/dh.pem
      ---%<-------------------------------------------------------------------

(This file was created from the wiki on 2017-05-11 04:42)