Reject mail from invalid domains

[Gerard Seibert]

On Monday May 28, 2007 at 12:56:02 (PM) Koopmann, Jan-Peter wrote:

> >       im using Fedora core 6, with Mailscanner 4.59.4 and sendmail
> > 8.13.8. I want to block email from invalid domains. Can i do this with
> > Mailscanner/spamassassin or has to be done at MTA level?
> 
> You probably could do this with spamassassin but the MTA is the correct
> place. How do you define "invalid domain"? That's the interesting
> question. 

The mail should definitely be blocked by your MTA. If you accept it and
then try to bounce it, it will cause 'backscatter' which could cause you
to be blacklisted yourself.

-- 
Gerard

"I once heard two ladies going on and on about the pains of childbirth
and how men don't seem to know what real pain is. I asked if either of
them ever got themselves caught in a zipper."

        Emo Philips