troubleshooting Question

Some domains do not receive emails from our domain

Avatar of Zaurb
Zaurb asked on
ExchangeEmail ProtocolsTelecommunications
6 Comments1 Solution880 ViewsLast Modified:
I have a very urgent problem.
Our users can send emails to other domains and receive all emails from all other domains. However, for about a week or so we can't send emails to users in two-three other domains. We receive an ndr stating that:

eTrust Secure Content Manager SMTPMAIL could not deliver the e-mail below because of unreachable host Please check the recipients e-mail address before you try again:
test@somenet.com

Original message header:
=======================================

X-eSCM-MailFrom: <email@ourdomain.com>
X-eSCM-FileID: smtp_48344A7F_1375_0000.oub
Received: from 10.10.1.1 (10.10.1.1)
      by mail.ourdomain.com (10.10.0.10);
      Wed, 21 May 2008 18:14:55 +0200
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: multipart/alternative;
      boundary="----_=_NextPart_001_01C8BB5D.CE4C490E"
X-MimeOLE: Produced By Microsoft Exchange V6.5
Subject: test
Date: Wed, 21 May 2008 18:14:54 +0200
Message-ID: <smtp_48344A7F_1375_0002.eml@ourdomainserver.ourdomain.local>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: test
Thread-Index: Aci7Xc3xDjdtY/ydRIq5uBxrVdec+w==
From: "Bahramov Zaur" <email@ourdomain.com>
To: <test@somenet.com>


What is going on? Now, while I write this I received complains that there're more domains that can't receive emails from us.
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