[kwlug disc.] Greylisting for spam purposes

[Rashkae]

On Thu, Nov 30, 2006 at 04:40:09PM -0500, Insurance Squared Inc. wrote:
> That's correct.  I haven't looked, but I'd expect that if the headers 
> were actually looked at they'd realize that the spam was forwarded 
> through my servers but not originating from them.  But as I noted, this 
> is braindead large ISP's in the US.
> 

This isn't braindead at all.. (Unfortunate, but not braindead).  The only header that cannot be forged, and therefore the only one worth considering, is the header inserted by the receiving E-mail server, which includes the IP address of the server the message is being received from.  Everything else in headers of spam is less than worthless.


> 
> Paul Kopacz wrote
> >>
> >Just to clarify, spam gets sent to info at mycustomer.com, you end up 
> >forwarding this spam to mycustomer at aol.com, aol.com (in this example) 
> >blacklists your server as the source of the spam?
> >
> >Paul
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