From: Robin Lynn Frank (rlfrankparadigm-omega.com)
Date: Fri Dec 03 2004 - 10:55:57 CST

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On Fri, 2004-12-03 at 07:33, Duncan Hill wrote:
> 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.

No need to apologize.
>
> 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.

I only want to scan what I can't block by more efficient means. 419 and
other scams rely on freemail sources, usually outside the destination
country. We already block about 6000 freemail/webmail sources, but I
can't keep track of all the new ones that keep springing up. Nor is it
efficient to completely block yahoo, hotmail, gmail, etc., because I'd
have to whitelist too many addresses.
>
> 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.

Guess I'll take another look. Since this thread has now veered from its
original purpose, I think it may be time to say bye-bye to it. ;-)
--
 /"\ ASCII RIBBON Robin Lynn Frank
 \ / CAMPAIGN Director of Operations
  X AGAINST Paradigm-Omega, LLC
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