Event ID - 667

Event Id667
SourceMSExchangeMTA
DescriptionThe MTA work queue backlog has subsided leaving 300 messages in the queue. [MTA DISP:RESULT 23 234] (14)
Event InformationThe work queue alarm may log two different events to notify the administrator when the work queue reaches a certain size. One event notifies the administrator that the work queue has reached the "alarm on" threshold. After the work queue diminishes in size, the MTA will log a warning with the event ID 667.
For more information click on the link given below.
Reference Links MTA Logs Warning Events When Queues Reach Specified Sizes

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