[100581] in RedHat Linux List

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RE: MX secondary, dns and sendmail - what's wrong?

daemon@ATHENA.MIT.EDU (Chuck Mead)
Sat Nov 21 23:39:27 1998

Date: Sat, 21 Nov 1998 23:40:07 -0500 (EST)
From: Chuck Mead <chuck@moongroup.com>
To: Kenneth Ho <macbrush@macbrush.com.hk>
cc: redhat-list@redhat.com, recipient list not shown: ;
In-Reply-To: <000001be14fb$d8efe5e0$64e84dca@alice.macbrush.net>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com

On Sat, 21 Nov 1998, Kenneth Ho wrote:

> I am using a box with 5.1/5.2 components mixed together. I am having a
> similar headache with sendmail setup. What I need is fairly simple, a backup
> server cache all the mail while the main server is down. I was told to do
> the following, and I did.
> 
> 1. Setting up DNS record
> 	doamin.name.	MX 10	main.server.
> 	domain.name.	MX 50	secondary.server.
> 
> 2. Put the domain name in main's sendmail.cw and in relay_allow of the
> secondary.
> 
> 3. Test it by relaying mail through secondary server.
> 
> I am sure everything was set correctly, so I thought it should works. My
> main server was actually down last night, so the secondary answered all
> incoming mail traffic, then I've got following error:
> 
> The original message was received at Thu, 19 Nov 1998 08:41:52 +0800
> from philemon.xc.org [204.31.147.20]
> 
>    ----- The following addresses had permanent fatal errors -----
> <macbrush@macbrush.com.hk>
> 
>    ----- Transcript of session follows -----
> 553 croaky.macbrush.com.hk. config error: mail loops back to me (MX
> problem?)
> 554 <macbrush@macbrush.com.hk>... Local configuration error
> 
> I know there is something missing in sendmail config, anyone came across
> this problem could shine me a light? I really like to make it works before I
> have to consider qmail. Thanks in advance.
> 

"Mail loops back to me" is a FAQ re: sendmail.  Read the sendmail FAQ
at http://www.sendmail.org.  I had it and fixed it!

Cheers!
--                         
Chuck Mead, CEO - Moongroup Consulting, Inc. <chuck@moongroup.com>
http://www.moongroup.com/
http://www.moongroup.com/unix/

There's no such thing as a free lunch.
                -- Milton Friendman


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