XFOR: Recipient Name Not Recognized / Recipient Not Found (168557)

MORE INFORMATION

The NDR on a message with an incorrect domain name looks like the following:

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

   Subject:hello there
      Sent: 3/27/97 11:18 AM

   The following recipient(s) could not be reached:

      'TEST@JUNK.TEST.CA' on 3/27/97 11:18 AM
            The recipient name is not recognized
            MSEXCH:IMC:SERVER:SITE:ORG 3902 Host Unknown
				

This is a common error; it is most likely due to a sender's addressing error. You receive this message back from the System Administrator when you have sent e-mail to a domain name (for example, JUNK.TEST.CA) that does not exist on the Internet. The Internet has "Global" Domain Name Servers that resolve Domain Names to systems. If this domain name is not found, it cannot be routed any further.

An NDR from an Exchange 5.5 server on a message with the correct domain name but the incorrect user name looks like the following:

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

      To: 'hello@microsoft.com'
      Subject: test
      Sent: 3/27/97 11:21:30 AM

   The following recipient(s) could not be reached:

      hello@microsoft.com on 3/27/97 11:21:30 AM
            Recipient Not Found
            MSEXCH:IMC:REMOTESERVER:REMOTESITE:REMOTEORG
				

This error is a "Recipient Not Found" error. The mail got to the other system, but the username (Hello, in this example) did not exist. This error is again most likely due to a sender's addressing error. Check the address again, and resend.