FreeBSD mailing list reverse DNS problem

[Paul Schmehl]

--On Friday, April 29, 2005 03:14:36 AM -0700 Ihsan 
<ihsan_junaidi at yahoo.com.sg> wrote:
>
> I've checked and rechecked with internal and external
> name servers which allow foreign queries that my IP is
> resolvable to anggerik.meltechsystems.net (dig -x
> 202.71.100.92) but somehow FreeBSD servers couldn't
> get the reverse information.
>
I checked, and your DNS ids your box as the MX for your domain as well.

The first thing I would do is telnet *from* your mailserver to the FreeBSD 
mailserver and try a manual SMTP session and see what happens.  If you get 
rejected then, you *know* it's a problem with the FreeBSD server.

You probably know this already, but just in case:

% telnet server.freebsd.org 25
HELO meltechsystems.net
MAIL FROM: you at yourdomain
RCPT TO: list at freebsd.org

If all this works, then something else is causing the problem.

Paul Schmehl (pauls at utdallas.edu)
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu