Qué significa este aviso?

Ya es el segundo aviso que recibo muy similar. El último dice:

""This is an automatically generated Delivery Status Notification

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipient has been delayed:

jonathanh46@its.edu.com

Message will be retried for 2 more day(s)

Technical details of temporary failure:
TEMP_FAILURE: Could not initiate SMTP conversation with any hosts:
[its.edu.com (1): Connection refused]


Received: by 10.48.1.12 with SMTP id 12mr1673016nfa;
Wed, 02 Nov 2005 02:21:40 -0800 (PST)
Return-Path: <asaperas@gmail.com>
Received: from antonio ( [62.57.231.82])
by mx.gmail.com with ESMTP id y23sm182824nfb.2005.11.02.02.21.33;
Wed, 02 Nov 2005 02:21:40 -0800 (PST)
Message-ID: <000a01c5df97$36a16610$52e7393e@antonio>
From: "Antonio de Barcelona" <asaperas@gmail.com>
To: "Jonathan hernandez Galvan" <jonathanh46@its.edu.com>
References: <eFP3tVv3FHA.3260@TK2MSFTNGP10.phx.gbl>
<00f901c5df3f$c800da80$e900a8c0@maquina>
Subject:
MIME-Version: 1.0
report-type=disposition-notification;
boundary="-=_NextPart_000_0006_01C5DF9F.851E8090"
X-Mailer: Microsoft Outlook Express 6.00.2900.2180
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180


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Alguien sabe qué significa todo esto?. Yo uso el correo de Gmail únicamente
para responder a los de este Grupo que me mandan algún email suyo.

Antonio.