Backscatter & challenge response
Kevin.Murphy at midland-ics.ie
Fri Apr 11 10:25:58 IST 2008
Sorry for jumping in on this - but wondered how you went about
watermarking? I use Sendmail / MS
> In common with lots of people I've seen a massive increase in the amount
> backscatter my domains are getting. I implemented watermarking which has
> helped a great deal.
> What I'm getting complaints about now are the mails coming in from
> challenge response systems, the mails don't come from postmaster, <>
> so the watermark does not get looked at.
> Just wondered if anyone had any bright ideals as to how to combat it?
> I've been looking at a selection I've been sent through this morning and
> there doesn't seem to be anything consistent about them and there not
> hitting many spamassasin rules.
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