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Queue is full of messages from MAILER-DAEMON to non-existent domains

Created: 28 Oct 2013

Hi,

-Messaging Gateway version 10.0.1

When I view the Messaging Queue in our gateway it is full of messages To email addresses of domains that don't seem to exist and they're From MAILER-DAEMON. The error is 421 4.4.0 [internal] Failed to connect: no mail servers for this domain could be reached at this time.

When I search the Audit Logs for the recipient address, it indicates that it was marked as spam.

What is causing these messages to fill up the queue.

Thanks

P.S. If needed I can provide a snapshot of the Messaging Queue and/or Audit Logs.

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