[ILUG] Anti-virus filters and sendmail

[Kenn Humborg]

I've thought about this for a while and no simple solution
popped up...

I'd like to run _every_ message that goes through sendmail
on a particular machine to be virus scanned.  Network Associates
have a Linux version of their scanner that will do the anti-virus 
part, but there are two remaining steps:

1. A script to break apart a message's body and attachments 
   and scan each part.
2. Sendmail rules/patches to send each message off for scanning.

I'm sure some Perl hacker here can do number 1 in their sleep.

But what's the best way to do number 2?  Does 8.9.x have
provisions for running arbitrary programs over messages?

Could I direct all incoming messages to a custom mailer that would
do the scan and submit the message back to sendmail (perhaps 
using a different .cf file) and send it on it's merry way.  I'm afraid that
this might lose envelope information.

Has anyone here done anything like this?

Later,
Kenn