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Can't delevier mail to company use to host on exchange

Posted on 2007-03-23
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Last Modified: 2010-03-17
My exchange server 2003 use to host @abc.com this has since become it's own company nd has its own e-mail server which they have no issues with
When some one in my company @123.com sends and e-mail to abc.com they get  

Your message did not reach some or all of the intended recipients.

      Subject:      the great one
      Sent:      3/23/2007 9:09 AM

The following recipient(s) could not be reached:

      jojo@abc.com on 3/23/2007 9:09 AM
            The e-mail account does not exist at the organization this message was sent to.  Check the e-mail address, or contact the recipient directly to find out the correct address.
            <MAIL.123.com #5.1.1>

We can recieve mail from @abc.com and get same message when we reply
We can send a to anyone in abc.com for yahoo, hotmail etc

I have removed abc.com form DNS and exchange server once they started hosting there own mail

This is becoming a real issue as we need to send a lot of mails between the two companies

Help

thanks
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Question by:Liam_Cloake
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MATTHEW_L earned 250 total points
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You probably still have a recipiant policy on your Exchange server for abc.com, which would prevent it from being delivered correctly.

If that is not it, do an nslookup for abc.com

also

nslookup
set type=mx
abc.com

make sure those are valid mail servers, hopefully their mailservers and not yours etc.  Post back the results.
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by:Liam_Cloake
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In recipiant policy there is no trace of abc.com only 123.com, 123.ie
also nslookup the Mx records for both are completelly diffrent abc.com is pointing to the correct server works fine for everyone outside of 123.com

thanks

Liam
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by:MATTHEW_L
MATTHEW_L earned 250 total points
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Is there a possibility that somewhere in your organization you still have a user with an SMTP address of @abc.com?  Try doing a search in AD for that and see if you have any users, if so remove that SMTP address.
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by:MATTHEW_L
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Did you find a user with an outdated SMTP address of the other company?
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