Hullo all, hopefully someone can help me with this. When sending email via my ispconfig server from a mail client (eg: outlook) I get this: The following recipient(s) cannot be reached: '[email protected] Server error: '554 5.7.1 <[email protected] Sending from webmail works fine. I believe this is something to do with the 'smtpd_sender_restrictions' line in my postfix main.cf...which says this: "smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf" that 'mysql-virtual_sender.cf' is set to look in the 'mail_access' table... which is empty. Is that the problem? Or am I on a wild goose chase with that?