If there are messages stored in the queue there will always be a (temporary) error when delivering to the destination server.

To investigate the issue:

  • verify you have set a correct destination route (also ensure there are not multiple destination routes specified, normally there should just be 1 route).
  • check the logs on your destination server to investigate why it's not accepting the delivery attempts.
  • run a test to check the response of your destination mail server.
  • if after following these steps you still have an issue, please contact SpamExperts support providing a sample sender/recipient/date to investigate.
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