HJÆLP kan ikke sende mail til hotmail

Når jeg, fra min server via php, sender mail til @hotmail.com eller @msn.com så bliver de afvist med fejlen:

MailEnable: Message delivery has been delayed.

Message is waiting at XXX.XXXXXX.XX for delivery to mx1.hotmail.com.

The message will be retried for another 48 hours.

Reason: Mail Server for msn.com could not be contacted at this time. MailEnable will keep trying to deliver this message and will notify you of any progress.


Message headers follow:
   
Received: from [192.168.1.12] ([80.62.63.138]) by
XXX.XXXXXX.XX with MailEnable ESMTP; Wed, 15 Mar 2006 11:06:09 +0100
Message-ID: <4417E712.5020606@XXXXXXXXX.XX>
Date: Wed, 15 Mar 2006 11:06:10 +0100
From: XXX XXXXXXXXXXX <XXXX@XXXXXXXXX.XX>
Organization: XXXXXXXXXXX
MIME-Version: 1.0
To:  XXXXXXXXXXXX@msn.com
Subject: top
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit