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Re: What is GreyListing (was: Re: Christian Hammers...)



begin  quotation of Arnt Karlsen:

> On Tue, 20 Jul 2004 14:48:36 +0200, Christian wrote in message 
> <20040720144836.112a037d@xeniac.intern>:
> 
> > not a trojan-winXP-desktop 
> 
> ..how does these act, one shot, or all the time?  

Those act as a continuous one-shot deal; to put it another way, they
aren't listening on any port for SMTP.

> ..how are such Wintendos best shot down?

Look at the originating IP, and mail abuse@ for that netblock, and
perhaps submit them to SpamCop.  Mailing abuse works wonders sometimes
- most organizations don't have monitoring tools in place to detect
excess SMTP traffic, but more than a few have competent admins that
don't like junk mail either.

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