Question : The following recipient(s) cannot be reached

I keep getting the following error despite the fact this user does not exist on active directory or distribution list.  please advise on how to correct.

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

      Subject:      Canceled: 1 - 2 - 1
      Sent:      14/06/2010 13:57

The following recipient(s) cannot be reached:

      Joe Bloggs on 14/06/2010 13:57
            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.
            <tcg.internal.change.com #5.1.1>

Answer : The following recipient(s) cannot be reached

Have you taken a look at System stand-alone Optional Component Manager?

Windows XP and Windows Server 2000 / 2003 have a built-in utility called the System stand-alone Optional Component Manager (sysocmgr.exe) to programmatically add or remove Windows components.

Please read these for more info
http://thesystemadministrator.com/The_System_Administrator/Tips_&_Tricks/Install_Windows_Components_from_Command_Line/
http://www.myitforum.com/articles/5/view.asp?id=8792