- /etc/postfix/mysql/*
- /etc/dovecot/dovecot-mysql.conf
- /var/www/roundcubemail/config/, main.inc.php and db.inc.php
- /var/www/roundcubemail/plugins/password/config.inc.php
- /var/www/iredadmin/settings.ini
- /etc/policyd*.conf
- /etc/amavisd/amavisd.conf
Don't forget to let us know if i missed some files.