[NCLUG] spam help

[Bob Proulx]

Matt wrote:
> I use SpamAssasin and it works fairly well but recently I've been
> receiving 40-50 messages a day from mailers, all along the lines of
> "we can't deliver your email because {we think you're a jerk, this
> person doesn't exist, you look like spam} and this is all because some
> spammer is using my domain as a return address.

This is called "backscatter spam".  Google for that and you will find
lots of information.  Here is one good link.

  http://www.postfix.org/BACKSCATTER_README.html

> Anyway, does anyone know of a way to get rid of these messages? I have
> so many mail delivery messages that if there was a legitimate one I'd
> never know about it.

What mail transfer agent are you running?  Postfix?  Exim?  Or heaven
forbid, Sendmail?  The link I posted above has good information on
blocking backscatter spam in Postfix.

Bob