From: Duncan Hill (postfixnacnud.force9.co.uk)
Date: Fri Dec 03 2004 - 09:33:36 CST

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On Friday 03 December 2004 14:41, Robin Lynn Frank might have typed:

> So if I *only* want to check for spam on about 50 domains/CCtlds, how
> many millions of entries would it take to reduce spam check to that
> small a number?
>
> Amavis, by default, submits everything to SA except what is listed.
> What I need is the exact opposite...don't send to SA unless it is
> listed.

Ah, I missed that part of the thread, apologies. Google has brought me up to
speed now.

I don't know if what you're attempting to do is logical, simply because you
have no verification that the sender field is legit and thus needs to be
scanned / not scanned. It seems to me, that if I can work out one of your
'do not scan' senders, I can bypass scanning easily and get spam through to
your users.

That said, the sample config does have an SQL lookup to determine
white/blacklist by sender, so Amavis must have the ability to do it.

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