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Date: Fri, 11 Apr 2003 18:59:05 -0400
From: Bill Moran <wmoran@potentialtech.com>
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To: Konrad Scorciapino <konrad@scorciapino.org>
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cc: freebsd-questions@freebsd.org
Subject: Re: Problems with the list
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Konrad Scorciapino wrote:
> Hi,
> 
> I am getting a lot of error messages when sending emails to the mailing list. 
> Here are some exemples:
> 
> Warning: could not send message for past 4 hours
> 
> From: 
> Mail Delivery Subsystem <MAILER-DAEMON@ensim.com>
> 
> 
> To: 
> <konrad@scorciapino.org>
> 
> 
> Date: 
> Yesterday 22:00:25
> 
> 
>     **********************************************
>     **      THIS IS A WARNING MESSAGE ONLY      **
>     **  YOU DO NOT NEED TO RESEND YOUR MESSAGE  **
>     **********************************************
> 
> The original message was received at Thu, 10 Apr 2003 17:46:27 -0300
> from 200-161-254-212.dsl.telesp.net.br [200.161.254.212]
> 
>    ----- The following addresses had transient non-fatal errors -----
> <freebsd-questions@freebsd.org>
> 
>    ----- Transcript of session follows -----
> ... while talking to mx1.freebsd.org.:
> 
>>>>RCPT To:<freebsd-questions@freebsd.org>
> 
> <<< 450 Client host rejected: cannot find your hostname, [216.12.211.199]
> <freebsd-questions@freebsd.org>... Deferred: 450 Client host rejected: cannot 
> find your hostname, [216.12.211.199]
> Warning: message still undelivered after 4 hours
> Will keep trying until message is 5 days old
> 
> 
> Is this a problem with my mail service or with the list?

This is in the FAQ:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/misc.html#FREEBSD-MAIL-BOUNCES

Looks like your RDNS isn't set up correctly.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com