[plug] Preferred mail scanning system?

[Craig Ringer]

Bernd Felsche wrote:

> Amavis would be top of my charts. The commercial AntiVir version works
> well as a content filter with postfix. I have it running that way at
> one "site" (actually a number of servers throughout Australia).

OK, I'll have to look into that. I see those two amavis variants coming 
up quite a bit, though I was unaware there was a commercial variant.

> The anti-virus and anti-spam scanners all seem to require one
> instance per message. That's the simple method of implementation and
> intuitively; the most secure.

What about SpamAssassin's spamd, and clamav's clamd? My understanding is 
that both of those used the Apache 1.x daemon service model, rather than 
strict one-helper-per-job. I could have easily missed something though.

--
Craig Ringer