Subject: Re: Sendmail question
To: BSD Current Users <>
From: Bill Chiarchiaro <>
List: current-users
Date: 02/21/2003 12:07:57
> Is there any way in sendmail to disallow incoming mail from a place
> whose IP address does not map to a FQDN?

FWIW, this is easy to do in postfix (although I no longer do it; there
are too many lazy ISPs who don't set up PTR records for legitimate
customers  --- I'm depending more on spamassassin now).