Event ID - 6011

Event Id6011
SourceNotificationServices
DescriptionThe delivery protocol could not be flushed.
Event InformationAccording to Microsoft:
Explanation:

This error occurs when the distributors call to the IDeliveryProtocol.Flush() method of a delivery protocol generates an exception.
User Action:
If you are using a built-in delivery protocol, examine the error log entry to determine the cause of the failure. If you are using a custom delivery protocol, it is throwing an exception in its implementation of the IDeliveryProtocol.Flush() method. The error log entry contains more details about the type of exception that was thrown. Examine your code to determine why the exception is being thrown.
Reference LinksEvent id 6011 from source Notification services

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