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:
Original message header:
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
X-MimeOLE: Produced By Microsoft Exchange V6.5
Date: Wed, 21 May 2008 18:14:54 +0200
From: "Bahramov Zaur" <email@example.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.