A configuration error in the e-mail system caused the message to bounce between two servers

ERROR
1. A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.

EVENTVWR
A non-delivery report with a status code of 5.4.6 was generated for recipient x-ex;/O=EXCHANGE/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=

Cause: A forward loop was detected by the categorizer. This is a common hosting configuration problem caused when someone uses the provisioning tool to create a contact in one organization unit and creates a user in a different organization user that share the same e-mail address.

SOLUTION
1. The problem is due to existence of same email address in multiple user id or contacts.
2. Edit Exchange Default Policy,





3. Exchange->Recepient Policies->Default Policy->Email Address->SMTP->EDIT


Deselect, This Exchange organization is responsible for all mail delivery to this address.


If the selection is not highlighted, make a other policy as primay and then edit the policy.

REF: http://support.microsoft.com/kb/324732