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Date: Tue, 12 Aug 1997 09:32:40 +0200
To: xiyuan qian <xiyuan@npc.haplink.co.cn>, freebsd-isp@freebsd.org
From: Peter Olsson <pol@leissner.se>
Subject: Re: change the domain name? 
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Hello!

>but the mail server can not work. I mean, I can NOT send mail to 
>user@mailhost.haplink.com.cn, always get the "mail loop back to myself"
error.
>I only changed the DNS server configuration. How can I configure the sendmail
>to let it handle the messages to haplink.co.cn and haplink.com.cn?

You must have this new domain in either sendmail.cf or sendmail.cw.
Your old domain should be in there somewhere, use that as example.

Peter Olsson    pol@leissner.se