Having trouble figuring this one out. My clients can’t send email to sbcglobal.net from our Exchange server. Server generates the above error with this additional info:
A non-delivery report with a status code of 5.3.0 was generated for recipient rfc822;user@sbcglobal.net (Message-ID <14A9986221C31843B635CEF26B6911865E24A8@mycompany.local>). Causes: Exchange mistakenly attempted mail delivery to an incorrect MTA route. For more information, click http://www.microsoft.com/contentredirect.asp. Solution: Check your route and topology; use the winroute tool to ensure the routes are properly replicated between servers and routing groups.
have checked DNS, blacklist info etc.
Loaded the winroute tool.
