I have an exchange 2007 server where I can receive emails from gmail, hotmail etc. but when I sent an email from one of the domains another Exchange server, the sender is getting following NDR:
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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.
< mx2.abc.ca #5.1.1 SMTP; 550 sorry, mail to that recipient is not accepted (#5.7.1)>
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Helpppp…..
