[Mimedefang] code to handle "troublesome domains"

[Lucas Albers]

> http://lists.roaringpenguin.com/pipermail/mimedefang/2003-September/008088.html
>
> I posted some code that compared the sender's email address to the
> sending relay for certain domains which spammers love to use (aol.com,
> hotmail.com, etc.).  If user at hotmail.com came from a relay that did not
> reverse resolve and match /.*hotmail.com/ I rejected it.
Is it possible to just have this add to the spamassassin score?
For example add +3 to mail that fails this check?
That would seem to be a good method to reduce false positives but still
check mail sent through using a false relay.

--Luke