Craig,

> There is something going on.  We're seeing a ton of backscatter as
> well.  It seems that spammers are resorting to mass joe jobs, and
> have been doing so for a couple of weeks.  There were a couple of
> posts over on the SA list recently saying that some people are seeing
> this same thing in spite of publishing SPF records.  So while SPF may
> be a deterrent, it appears not to be much of one in this case.  I'm
> not quite sure what to do about it except wait for it to subside.
> Anybody have any ideas?
> There's an article on securityfocus about what's happening:
> http://www.securityfocus.com/blogs/720

I doubt that publishing SPF has any significant effect on spammers'
choice on hijacked domains, mainly because hardly any recipient is
prepared to ditch incoming mail simply because it fails a SPF check.

See also:
  http://marc.info/?l=amavis-user&m=120759635016508
  http://marc.info/?l=postfix-users&m=120768702807595


Mark

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