Hi, I was looking for a way to disable smtp access (to send e-mail over the server) from the control panel. There is a field "disablesmtp" in the mail_user table already. This field needs to be added to the sasl2 sql query as well: File /etc/postfix/sasl2/smtpd.conf: Code: sql_select: select password from mail_user where email = '%u@%r' [b]and disablesmtp = 'n'[/b] For now, this option needs to be set in the database directly using for example phpmyadmin.