You can use the patch at http://www.qmail.org/qmail-1.03-mfcheck.3.patch to
do this. I have used it, and love it. We were seeing MUCH more spam from
nonexistant domains than legitimate ones, so this helped out a ton. Call me
old school, but I think every return address should have a valid, resolvable
DNS entry, so I don't shed too many tears when emails with bad DNS
information don't get through.
-D
>-----Original Message-----
>From: Sgt Chains [mailto:[EMAIL PROTECTED]]
>Sent: Wednesday, June 14, 2000 3:13 PM
>To: [EMAIL PROTECTED]
>Subject: Bouncing mail w/ no reverse DNS
>
>
>Forgive me if this is somewhere in the Docs, I can't find it.
>
>I would like to bounce inbound mail that comes in that can't resolve
>reverse DNS.
>
>A lot of net admins out there have started to not setup DNS entries for
>their dial-up accounts believing that this is a better approach than
>registering w/ the MAPS/DUL list.
>
>Personally I don't agree... but I'm getting a lot of trespass spam via
>non resolved DNS.
>
>Any ideas?
>
>--Larry
>mailto:[EMAIL PROTECTED]
>
