We have a pre-queue filter set up with a pretty boring config. In postfix, smtpd_proxy_filter = localhost:10024
Then in amavis, we do whatever spam and virus scanning we need to do. If the message is spam/virus, we reject it at SMTP time rather than bouncing it. Anything else we pass. We don't block any file extensions by default. But now, (only) one of our domains wants us to block zip files. Is there a way to do that for a single domain in a pre-queue filter?
