From: - Kone Bakenon - (koneuniv-ouaga.bf)
Date: Wed Aug 23 2006 - 08:15:56 CDT

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> On Aug 23, 2006, at 6:36 AM, - Kone Bakenon - wrote:
>
>> Hello all,
>> One of my friend send me a mail and he get the following error :
>>
>> The following recipient(s) could not be reached:
>>
>> 'usersmydomain.com' on 8/22/2006 11:02 AM
>> Could not deliver the message in the time limit specified.
>> Please retry or contact your administrator.
>> <BCMEVS7.ad.bcm.edu #4.4.7>
>
> Find the logs on YOUR system that show this system trying to connect,
> and see what it says there on why the connection was refused. If you
> never see a connection attempt, then their server never tried
> delivering the mail.

This is my log when i sent him a mail :
Aug 23 13:05:16 mail postfix/smtpd[27960]: connect from
bcmexps06.corp.bcm.tmc.edu[128.249.232.16]
Aug 23 13:05:21 mail postfix/smtpd[27960]: NOQUEUE: reject: EHLO from
bcmexps06.corp.bcm.tmc.edu[128.249.232.16]: 450 <BCMEVS6.ad.bcm.edu>: Helo
command rejected: Host not found; proto=SMTP helo=<BCMEVS6.ad.bcm.edu>
Aug 23 13:05:21 mail postfix/smtpd[27960]: disconnect from
bcmexps06.corp.bcm.tmc.edu[128.249.232.16]

>
> In looking at your post to the list, I see one potential problem.
> Your mail server at 212.52.131.4 doesn't resolve to a DNS name, but
> reverse DNS on mail.univ-ouaga.bf resolves to 212.52.131.4. If
> they're trying to send mail to mail.univ-ouaga.bf and can't reach an
> IP address, I don't think you'll get much incoming mail there...
>

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