More mail than you can shake a stick at

Today perl.org absorbed almost 30,000 spam and virus emails.

About 1/3 of that is viruses caught by clamav.

Plus at least another 12,000 invalid messages we never accepted. And I'm sure there's another huge bunch thats not getting logged properly

Then there's the huge portion of the internet that's outright blacklisted.

Without qpsmtpd, we'd be lost.