I keep getting messges in my deferred delivery queue of users that are no longer here. Their account has been deleted. Is there a way to stop these messages?

This problem may occur when the following conditions are true Many messages are sent to users who have been disabled by deleting the msExchMasterAccountSID attribute. http://support.microsoft.com/kb/838644 Please make sure you are on latest Service Pack LevelVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi Norman, Thanks for your response. I agree with Vinod that you need to have latest Service Pack installed for Exchange Server. In addition, I would like to explain if the users are removed from AD, the Exchange server should generate NDR indicated that the recipient does not exist in the organization instead of queue the message in deferred delivery queue. According to KB823489, the message queued for deferred delivery if following conditions are true: 1. A message is sent to a users mailbox while the mailbox is being moved. 2. The user does not yet have a mailbox, and no master account security ID (SID) exists for the user. 3. An administrator configures SMTP in a way that causes a message to loop. SMTP moves these messages to this queue. This permits the administrator to correct the problem without causing messages to immediately return with "maximum hop count exceeded" errors. Moving messages to this queue also helps to prevent too many performance hits to the server resources. Therefore, I suggest you check whether any AD replication issue exists. If you ensure the user has been deleted on all the GCs, please restart the SMTP service and send a message to the recipient again to check whether the message still stuck in the deferred delivery queue. Mike Shen TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com