problem sending messages with mail enable plesk 8.6.0.5

[soniacharly]

hello all and see if I can count on someone or something I have a server with 2003 server and plesk 8.6.0.5 and these days I passed with two customers who send them an email and come back with this message, and looked in MailEnable SMTP DNS and everything is right where you can go shooting

MailEnable: Message delivery has been delayed.

Message is waiting at promain.net for delivery to ses000900-165.es.mapfre.net.

The message will be retried for another 26 hours.

Reason: Mail Server for mapfre.com could not accept your email at this time. MailEnable will keep trying to deliver this message and will notify you of any progress.


Message headers follow:

Received: from Javier ([80.35.103.192]) by promain.net with MailEnable ESMTP; Mon, 02 Feb 2009 15:46:46 +0100
From: "Javier Miguel" <[email protected]>
To: '=?iso-8859-1?Q?Feliu_Rodr=EDguez=2C_Jose_Luis?=' <[email protected]>
Subject: =?Windows-1252?Q?Le=EDdo:_001887840F_-_TEIC?=
Date: Mon, 2 Feb 2009 15:42:07 +0100
MIME-Version: 1.0
Content-Type: multipart/report;
boundary="----=_NextPart_000_0012_01C9854C.CECC8B50";
report-type=disposition-notification
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
In-Reply-To: <4A30339008F41843A3FDCBB063DD6F76089D561E@SES00090 0-171.es.mapfre.net>
Thread-Index: AcmFLhVNDpHXHlwIQXOzNOfIoxUKNQABNY2AAAEHo+AAA1DSGw ==

 

[Spyder]

some one found ???

Some one found the reason ? or solution ?

All dns semms OK, DNS queries work perfect from server console.. but I still can't send emails from domains hosted on Win2k3 server ..