Here is the patch that fixes this issue. Instead of moving backup file, it just copies it. Cause of that upgrades of the package won't override user's settings in postfix's main.cf.
** Patch added: "Fix" https://bugs.launchpad.net/ubuntu/+source/dovecot/+bug/715056/+attachment/1864374/+files/dovecot.debdiff -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dovecot in ubuntu. https://bugs.launchpad.net/bugs/715056 Title: invalid ssl-certificates in /etc/postfix/main.cf after security upgrade -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
