You can redirect emails from the deferred queue to another downstream mail server by using the Email Security - Server appliance Web UI or CLI:
If your mail server encounters a temporary failure and is shut down for a period of time, you can redirect your emails in the deferred queue by configuring an IP address and port of another downstream mail server on the Email Security - Server appliance.
Note
You can redirect emails to another downstream mail server when the Email Security - Server appliance is deployed in Block analysis mode or Monitor analysis mode.
Prerequisites
Administrator, Operator, or Monitor access to the Email Security - Server appliance.
An established connection between your Email Security - Server appliance and the Internet.
The appliance database contains one or more emails that have been processed.
Verify that the Email Security - Server appliance is deployed in Block analysis mode or Monitor analysis mode. Use the
show email-analysiscommand. For details about how to configure Block analysis mode or Monitor analysis mode, see Configuring the analysis mode using the Web UI or Configuring the analysis mode using the CLI.