postfixadmin
This package relies on correct install of postfix’s virtual tables and it needs to be configured before usage. Be sure to read upstream’s /var/www/postfixadmin/INSTALL.TXT in order to accomplish the setup or upgrade. You should also take care of configuring apache to be able to use the web-based interface.
Should you want to make use of the autoreply (vacation) feature, install these packages as well: perl-mail-sender, perl-email-valid, perl-mime-charset, perl-log-dispatch, perl-mime-encwords, perl-params-validate and read upstream’s /var/www/postfixadmin/VIRTUAL_VACATION/INSTALL.TXT in order to setup autoreply (vacation) properly. Don’t forget to enable it in config.inc.php as well!