MS Mail Connector Interchange has failed processing message from Exchange. The message is left in the delivery queue. Use the MS Exchange Administrator to view the details for this message or remove it from the queue. This message entitled "<message subject>" is from <message sender>. This error message will be logged again the next time MS Connector is restarted if the message is not removed from the queue.
As per Microsoft: "These symptoms occur when you receive a message by means of the Internet Mail Connector that contains a REPLY-TO address that cannot be understood by the Microsoft Mail Connector". See ME158379 for more details.
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