The recent explosion of the MyDoom worm seems to have sparked interest in virus-scanning email systems. UNIX users, knowing their systems are essentially immune, tend to sneer a little at these outbreaks. I think that's wrong--would a tank commander sneer to see civilians overrun? We have a responsibility to cut virus propagation off at the knees by refusing to carry infected emails on our systems. I wrote qscanq to address this need in a scalable, secure way.
Qscanq scans every email message submitted to qmail before allowing it to be added to qmail's mail queue. Infected emails are rejected, not bounced, so you won't have to deal with double-bounces during virus outbreaks. Secure
Qscanq was designed for security from the ground up. Running qmail with qscanq should as secure as running qmail without it. There's even a security guarantee! Interoperable
Qscanq works with your existing qmail setup: absolutely no qmail patches are needed. Nothing to recompile or reconfigure. No unapproved patches to weaken qmail's proven security. You can even install binary qmail distributions, and then add virus protection with qscanq!
Note that if you do use Bruce Guenter's QMAILQUEUE patch, then qscanq will interoperate with that as well. Atomic