I am trying to setup a web server running Debian "Sarge" and Exim
4.34. After much research and even more trial and error, I think I
figured out the configuration scheme Debian uses for Exim 4. The
problem is when I try to have send email through a web feedback form,
the message is undeliverable. I get the following message back:
================================================== =============================

Return-path: <root@rivendell.alcorn.edu>
Received: from nobody by rivendell.alcorn.edu with local (Exim 4.34)
id 1CPO4G-0001OX-Di
for espeas@lorman.alcorn.edu; Wed, 03 Nov 2004 10:33:04 -0600
To: espeas@lorman.alcorn.edu
Subject: Web User Comment
From: root@rivendell.alcorn.edu
X-Priority: 3
X-Mailer: PHPFormMail Classic v1.06.0 (http://www.boaddrink.com)
Message-Id: <E1CPO4G-0001OX-Di@rivendell.alcorn.edu>
Sender: nobody <root@rivendell.alcorn.edu>
Date: Wed, 03 Nov 2004 10:33:04 -0600
Status: RO

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es)
failed:

espeas@lorman.alcorn.edu
SMTP error from remote mailer after MAIL
FROM:<root@rivendell.alcorn.edu> SIZE=1841:
host lorman.alcorn.edu [209.147.192.4]: 501
<root@rivendell.alcorn.edu>... Sender domain must exist

------ This is a copy of the message, including all the headers.
------

Return-path: <root@rivendell.alcorn.edu>
Received: from nobody by rivendell.alcorn.edu with local (Exim 4.34)
id 1CPO4G-0001OX-Di
for espeas@lorman.alcorn.edu; Wed, 03 Nov 2004 10:33:04 -0600
To: espeas@lorman.alcorn.edu
Subject: Web User Comment
From: root@rivendell.alcorn.edu
X-Priority: 3
X-Mailer: PHPFormMail Classic v1.06.0 (http://www.boaddrink.com)
Message-Id: <E1CPO4G-0001OX-Di@rivendell.alcorn.edu>
Sender: nobody <root@rivendell.alcorn.edu>
Date: Wed, 03 Nov 2004 10:33:04 -0600
------ This is a copy of the message, including all the headers.
------

Return-path: <root@rivendell.alcorn.edu>
Received: from nobody by rivendell.alcorn.edu with local (Exim 4.34)
id 1CPO4G-0001OX-Di
for espeas@lorman.alcorn.edu; Wed, 03 Nov 2004 10:33:04 -0600
To: espeas@lorman.alcorn.edu
Subject: Web User Comment
From: root@rivendell.alcorn.edu
X-Priority: 3
X-Mailer: PHPFormMail Classic v1.06.0 (http://www.boaddrink.com)
Message-Id: <E1CPO4G-0001OX-Di@rivendell.alcorn.edu>
Sender: nobody <root@rivendell.alcorn.edu>
Date: Wed, 03 Nov 2004 10:33:04 -0600

================================================== ==============================

Question: What do I need to do in order to inform Exim of the sender's
domain? I have checked Google, but nothing I've found seems to help.
Do I need to setup DNS on my system or is there an easier solution?

Thanks.

Eric