Please help me because I'm new. I'm trying to manage one server and I get this message every day. i don't know how to configure my mailserver.

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

xxxxxx@yahoo.fr
retry time not reached for any host after a long failure period

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Return-path: <admin@sssssssss.com>
Received: from ipa122.15.xxxxxxxxx ([ip] helo=webdesign)
by server1.xxxxxxxxxxx.com with esmtp (Exim 4.69)
(envelope-from <admin@congotribune.com>)
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for xxxxxxx@yahoo.fr; Fri, 29 Jan 2010 00:39:47 +0200
From: "Pascal Ntambue" <admin@domain.com>
To: <xxxxx@yahoo.fr>
Subject:
Date: Fri, 29 Jan 2010 00:39:39 +0200
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=20

=20

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