Sendmail Host name identification

[Katsu Tanda]

I have set up sendmail to properly send and receive my
email on my server. But the problem is, all my
outgoing email say this instead of my domain. (posted
at the end of email). How do i modify the sendmail.mc
file to use my dns katsu.no-ip.info rather than
localhost. I know i can just modify the /etc/hosts
file but I have other services running and dont want
them disrupted. Plus the dns is one from a dynamic dns
hosting site so i dont know how that would play in
modifing the hosts file. Other than that, sendmail
works great. Its just that yahoo and probably other
services throw stuff from localhost.localdomain into
the bulk/junk mail folder.

Thanks a lot,
Katsu

Received:
 from 24.208.180.255  (EHLO localhost.localdomain)
(24.208.180.255)   by mta213.mail.scd.yahoo.com with
SMTP; Wed, 29 Oct 2003 18:14:21 -0800

Received:
 from localhost.localdomain (localhost.localdomain
[127.0.0.1])         by localhost.localdomain
(8.12.8/8.12.8) with ESMTP id h9U25wK3021076        
for <ktanda586@yahoo.com>; Wed, 29 Oct 2003 21:06:00
-0500

Received:
 from localhost (katsu@localhost)         by
localhost.localdomain (8.12.8/8.12.8/Submit) with
ESMTP id h9U25rdT021072         for
<ktanda586@yahoo.com>; Wed, 29 Oct 2003 21:05:58 -0500

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