--On 18 October 2006 14:05:54 +0100 Andrew - Supernews 
<[EMAIL PROTECTED]> wrote:

>
> And callout does NOT HELP THIS AT ALL, since the spammers are quite
> happy to use sender addresses that exist.

Yes, they are. But really, they don't care whether they exist or not. It's 
easier for them to just use a bunch of addresses, and that's exactly what 
they do. My experience is that 75% or more sender addresses used by 
spammers actually don't exist.

-- 
Ian Eiloart
IT Services, University of Sussex

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