After upgrading Symantec Messaging Gateway (SMG) from version 10.6.4 to version 10.6.5 or later, the MTA service fails to start. Port 25 is not accessible and Messaging Gateway (SMG) does not accept email.
When trying to start the MTA service at the command line:
"Error: Malformed MTA config XML: Can't use an undefined value as an ARRAY reference at /opt/Symantec/Brightmail/mta/lib/perl/SMS/MTA.pm line 1280."
In the SMG Control Center:
In (Status -> Message Queues) A red X followed by "The selected queue is disabled".
The upgrade from 10.6.4 in some rare instances, removes the domains from the Domain Authentication field in (Spam -> Sender Authentication).
(NOTE: This issue may occur whether or not you have only the following domains selected)
The recommended upgrade procedure from the Messaging Gateway 10.6.5-1 Release Notes say to note the information on the Sender Authentication page prior to upgrade and confirm the settings are correct after completing the upgrade.
Add at least one domain to the Domain Authentication list.
Then restart the MTA service on all affected scanners.
Go to (Administration -> Configuration -> Select a scanner -> Services)
Check MTA and click stop.
Check MTA and click start.
Or restart the MTA service from the command line.
"service mta restart"
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