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Hi<br />
<br />
If Get-AcceptedDomain does not return the old domain...then<br />
<br />
It sounds like a outlook cache (n2k).<br />
Create a new profile and see if it then works ok.<br />
<br />
If still not working run. get-offlineaddressbook | update-offlineaddressbook &nbsp; &nbsp;On the exchange server<br />
Wait an hour or so and download the new oab from outlook sent/recieve option.<br />
<br />
Cheers
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<div>
May be you have send connector with your domain?<br />
Try restart transport service.
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It turned out that I needed to do two things. I had to remove the domain from the vendor I am using to scan incoming and outgoing email. I also had to remove the users themselves.
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<div>
Glad you got it fixed, I am left with one question.<br />
<br />
What do you mean by 'the vendor I am using to scan incoming and outgoing email.'
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<div>
Ahhh now I understand, we could never have guessed.<br />
Thanks for the update!
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Me either. I didn't realize they would be giving me an issue until i saw the relay error after i removed the users and the accepted domain.
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found out it was our email scanning vendor.
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<div class="content wysiwyg-content">
We had a department that had their own domain name that our E2K10 server accepted mail for. We recently sold the department and the buyers kept the domain name and moved email to their servers. <br />
<br />
I removed the domain from the accepted domains list and from the address list. However, when sending email to the domain in question, my servers are still trying to send it internally. <br />
<br />
I'm not sure what else i should change.
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We had a department that had their own domain name that our E2K10 server accepted mail for. We recently sold the department and the buyers kept the domain name and moved email to their servers. 

I removed the domain from the accepted domains list and from the address list. However, when sending email to the domain in question, my servers are still trying to send it internally. 

I'm not sure what else i should change.

Removing accepted domain from Exchange 2010

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.