Event ID - 310

Event Id310
DescriptionThe transfer-out message timer expired on message %1, object %2. [%3%4%5%6] (10)
Event InformationAccording to Microsoft:
The transfer-out message timer expired on the message. A non-delivery report (NDR) will be generated for the message.
Figure out where the message was destined to and troubleshoot the network connectivity between the two servers.
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