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Exchange 2003 users in DK cannot email their users in EE

Posted on 2008-10-03
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Last Modified: 2012-05-05
Have an Exchange 2003 that have been working for years and still does.

But suddenly we cannot email our frineds in Estonia. We have 13 emails in the exchange queue for ourcompany.ee and our we get status notification messages that our emails for ourcompany.ee has been delayed. It has been so for the last 4 days.

This is urgent.
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Question by:TANGLAD
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by:robrandon
ID: 22636668
Has anything changed on their end?  For example the IP address of the servers that receive their emails?  Perhaps you have a static MX record for their mail servers that need to be updated.

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by:TANGLAD
ID: 22636945
Hmmm. Don't know. They cannot email us either so the problem is both ways.
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robrandon earned 500 total points
ID: 22648895
Sounds like something definitely changed.

Go to www.mxtoolbox.com and put in their domain name.  See what servers are responsible for their email and see what they resolve to.

Then, on your Exchange server, go to a command prompt and use the NSLOOKUP utility.  When in the utility enter the following:

set type=mx
<enter their domain name>
set type=a
<enter each of the servers returned from the list above, each on their own line>

Confirm the results match what is on MXTOOLBOX.  If they do not match, you will need to adjust your DNS settings.

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by:TANGLAD
ID: 22648985
Thanks for great advice. Have followed your suggestions and results match. Also chekced blacklists and diagnostics. Everything seems fine but those to domains just can't talk to eachother.
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Expert Comment

by:robrandon
ID: 22649065
From your mail server, try to Telnet to the other mail server on port 25.

At command prompt:
TELNET <remote mail server IP> 25

What do you get?


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by:TANGLAD
ID: 22658450
Problem solved. It was a routing problem. Not at any of our ends, but at some network provider.
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