In rare instances, a malformed email message may cause the Brightmail Engine to fail. If this situation occurs, Symantec Messaging Gateway isolates the small number of messages that were being processed at the time of the failure and rescans them one at a time until the message that caused the failure is identified (causing the Brightmail Engine to fail again). The Brightmail Engine recovers from these failures quickly. The flow of mail is neither interrupted nor significantly delayed. When a bad message is detected, an alert is sent.
With Symantec Messaging Gateway's bad message handling feature, you can specify how many times the system scans a potentially malformed message before it classifies it as such and places it in the bad message queue.
For each retry (every time the system scans the malformed message) the Brightmail Engine fails. Use caution when setting this value.
You can then access and manage messages in the bad message queue with the mta-control command-line option.
Once the malformed message is identified, you have several options when you use the mta-control command as follows:
List email messages in the bad message queue
View or export the message to a specified URL or to the screen
Delete a message from the bad message queue
Bypass the Brightmail Engine and deliver the message to its original recipient
Deliver the message to system administrator(s) by email