Sorry if this is a bit simple, but I can't seem to figure out how the components fit together.
Given the following: 1) MX/Relay machine running postfix: relay.domain1.com 2) Client machine: client.domain2.com I'd like to restrict/deny (5xx permanent error) incoming messages from the Internet to client.domain2.com if they contain attachments. But no such restriction should be applied to other clients or to users on relay.domain1.com. I presume this would be done with some type of header check plus some type of restriction class. If that's true, then I need some help with both. If I don't even have that right, I'll need a some more help. ;-) Thanks, Michael
