How to resolve a delivery queue back up to Symantec Network Prevent
If you disable bypass to the Symantec Network Prevent servers and the servers are unreachable, messages back up in the delivery queue. Normally when the Symantec Network Prevent servers become reachable again, the delivery queue automatically drains as the servers process the messages.
The delivery queue may not automatically drain for any of the following reasons:
The amount of free hard disk space on Symantec Messaging Gateway is too low.
The amount of free memory on Symantec Messaging Gateway is too low.
The following conditions on Symantec Messaging Gateway are met:
The maximum number of messages in the delivery queue limit is reached.
The Defer new connections when delivery queue is full option is enabled.
If Symantec Network Prevent servers continue to be unavailable, the queue may grow to a large size and consume large amounts of disk space. This lowered disk space can impact Symantec Messaging Gateway's ability to deliver messages.
Table: Process to resolve delivery queue backups
Correct the issue with the Symantec Network Prevent servers. Confirm that the Symantec Network Prevent servers are running, have sufficient capacity for processing the given email volumes, and network paths are reachable.
If disk space is low on the Symantec Messaging Gateway Scanners, free disk space. Examples of ways to free disk space are to delete report data or logs.