I am working on a Webmail solution, that uses Squirrelmail, Postfix, and Dovecot. I am trying to block email between users, and I don't seem to be able to do this.
I was having trouble blocking emails selectively, so now I just trying to block all emails - to make sure it is working. In my main.cf, I have: smtpd_sender_restrictions = check_sender_access regexp:/etc/postifx/check_sender_access.regexp The check_sender_access.regexp file consists of: /./ REJECT /.*/ REJECT Shouldn't this reject all email that goes through the system? My local users can still email eachother. It is as if Postfix is being bypassed. Non-local users are being blocked, so I am beginning to wonder if Postfix is not being used when mail is between local user, perhaps it is a Dovecot issue? Is there any way to trace how an email moves through Postfix? It would be great to see what is happening when it encounters the smtpd_sender_restrictions and smtpd_recipient_restrictions.
