Re: [pmfirewall] Is it possible to block Email with Ipchains?

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From: Leland V. Lammert (lvl@omnitec.net)
Date: Tue May 22 2001 - 12:09:30 PDT

At 01:23 PM 5/22/01 -0400, you wrote:

>At first i though this was a DNS issue.
>
>Since the email is not even leaveing my server.

Dan,

Most mail agent programs (e.g. sendmail) are configured to reject an email
server if the reverse DNS is not configured. It sounds to me more like you
are still having DNS problems with your recipient mail server.

If it were the firewall configuration, it would block *all* port 25
traffic. I don't think there is any way that pmfirewall can be configured
to block a specific domain name (or tld).

Easy way to check - to nslookups on the domain name (set type=any to see
the MX records), .. then check the IP of the remote mail server for the
remote DNS config.

         Lee

============================================
    Leland V. Lammert lvl@omnitec.net
       Chief Scientist Omnitec Corporation
   Network/Internet Consultants www.omnitec.net
============================================

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