Exchange 2007 Your message wasn't delivered because of security policies - Requested #550 5.7.1 Recipient rejected
Posted on 2010-09-21
SBS2007 server. Trying to add an additional e-mail address for existing user. I go to user mailbox in Exchange Mtg. Console and then to properties for the user's mailbox under Recipient Configuration/Mailbox. On the e-mail address tab I add the new address, which is on the same domain.
When anyone tries to send a message to that address, they receive an NDR:
Delivery has failed to these recipients or distribution lists:
Your message wasn't delivered because of security policies.
The following organization rejected your message: Requested.
Sent by Microsoft Exchange Server 2007
Diagnostic information for administrators:
Generating server: PCSS1.pcs.local
Requested #550 5.7.1 Recipient rejected (R4) ##
In the above example, email@example.com is the new email address I added to a user, firstname.lastname@example.org. The server PCSS1.pcs.local is my internal server at my office that I'm sending the tests from.
I checked Mail Flow Settings for that user, and there are no delivery restrictions.