449 – Routing error (also called SMTP Error 4.4.9)
by admin on Jan.26, 2010, under Mail
SMTP Error 449 : This is a Microsoft Exchange Server specific error code. As per Microsoft’s documentation this error code is returned when either of the following conditions occurs : an SMTP connector is configured to use DNS without a smart host and also uses a non-SMTP address space (e.g. X.400), or A message was sent to a recipient who was identified as a member of a routing group that was deleted.
Microsoft recommends using the WinRoute tool to troubleshoot this error (Microsoft Knowledgebase article 281382)
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