Mail won't get sent. Here's output in /var/mail for the user:
The original message was received at Sat, 29 Sep 2007 11:44:08 -0500 (CDT)
from localhost [127.0.0.1]
----- The following addresses had permanent fatal errors -----
(reason: 550 Host unknown)
----- Transcript of session follows -----
550 5.1.2 <firstname.lastname@example.org>... Host unknown (Name server: mailhost: host not found)
Reporting-MTA: dns; hostxxx
Received-From-MTA: DNS; localhost
Arrival-Date: Sat, 29 Sep 2007 11:44:08 -0500 (CDT)
In my /etc/hosts I have:
10.xx.xx.xx mailhost mail
I can ping both mail and mailhost. I can manually telnet mailhost on port 25 and send an email. I verified sendmail is active. I even stopped and started it. I can ping a public host like www.novell.com
and it replies.
online 11:38:58 svc:/network/smtp:sendmail
I have all defaults in /etc/mail.