Event ID - 1279

Event Id1279
DescriptionA remotely-initiated %2 session-level transport connection was closed. Control block index = %1. [%3%4%5%6] (8)
Event InformationAccording to Microsoft:
A session-level transport connection that initiated from a remote server was closed.
Look for other errors in the Event logs to try to determine the reason for the connection being dropped.
Reference LinksExchange (MSExchangeMTA)

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