Jason Lindquist (jlindquist) wrote,
Jason Lindquist
jlindquist
Charming. I'm getting bounce messages for spam. Which means some spammer is using my address in the From: header. But the flood of bounces is easy enough to stave off... see, the address it's using is from a virtual domain, so no Message-ID header legitimately generated would actually contain that domain name. I have procmail look at the body of the bounce for the included message. If that domain is used in the message's Message-ID header, it's spam. Otherwise, it's something I legitimately sent, and a bounce I actually need to see.

# Screen out bounce messages from spam sent with me in the From: header
:0
* ^FROM_MAILER
{
  :0 B
  * ^Message-ID: .*@virtual.domain.goes.here.*
  bouncetrap
}

If I'm happy with what that filters, I'll stop saving the trapped messages and start bouncing them instead. (EXITCODE is your friend.)
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