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Old 11-29-2005, 10:07 PM   #1
xa-coupe
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Registered: Feb 2003
Location: Australia
Distribution: RH ES3 & Ubuntu
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QMail bounce problem


Hi, our usual Linux guru is MIA so it's up to me to fix this.
Rundown of setup: We are running Qmail on RHES3 ( sorry, I don't know how to find what version of Qmail ).

When sending to a specific domain we get the following bounce a few hours later:

<user.name@domain.com>:
Connected to 203.x.x.x but greeting failed.
Remote host said: 421 SMTP service not available, closing transmission
channel
I'm not going to try again; this message has been in the queue too long.



I've googled everything I can think of and searched through mumerous forums but can't find anything of relevance. I have looked in /var/qmail/logs ( that's from memory.. it's where the logs are stored anwyay ) and can't see anything that gives me a clue.

All other domains seem to be fine.

Apparently it is a relatively easy fix .. if you know how.

any help gratefully appreciated

Jeff
 
Old 11-30-2005, 02:59 PM   #2
david_ross
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Have you checked with the administrators of the remote system? It sounds like they are having problems. Can you send to an address at that domain from another e-mail server, gmail, hotmail etc?
 
Old 11-30-2005, 06:39 PM   #3
xa-coupe
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Quote:
Originally posted by david_ross
Have you checked with the administrators of the remote system? It sounds like they are having problems. Can you send to an address at that domain from another e-mail server, gmail, hotmail etc?
Thanks for the reply David,

Yes.. everyone else can send, including Hotmail and my home account. Other than the issue here, the administrators there tell me they have no problems at all.

I rebooted the server on the off chance that it would clear up ( I hate doing that but when you have run out of ideas ..... )

It's got me scratching my head.
 
Old 12-01-2005, 07:31 PM   #4
xa-coupe
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Looks like it may be a DNS problem. My desktop resolves their mail server fine but our mail server gives a different result. If I send an email with the mail server's IP they get through fine.

edit: I get the same 421 error if I try to telnet to the mail server concerned on port 25... if that's of help.

Last edited by xa-coupe; 12-01-2005 at 10:33 PM.
 
Old 12-02-2005, 01:38 PM   #5
david_ross
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It works if you use the IP but not if you telnet? That doesn't really make much sense as to why it would happen. Can you post the transcript of a test when you try with telnet.
 
  


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