[Wiltshire] Fed up of deleting zip file junk

[David Fletcher]

Getting really hacked off with all of the jerks out there sending out
spam with presumably windows virus infected zip files attached.
Actually, I've not had a legitimate email with a zip file attachment in
a very long time so I'm thinking of implementing this on my postfix
server to simply reject them:-

Configuration line in main.cf
mime_header_checks = regexp:/etc/postfix/blocked_attachments

The blocked_attachments file contains:
/name=[^>]*\.(pdf|zip)/ REJECT

which appears to be a standard rejection mechanism in more than one
how-to that I've found.

Question is, if I also implement a postfix white list, will the white
list override the reject mechanism to allow delivery of zip or other
attachments from legitimate sources?

Thanks for any help and advice,

Dave