Releasing Messages When an Email Security Appliance Is Unavailable
Normally, when a message is released from a centralized quarantine, the Security Management appliance returns it for processing to the Email Security appliance that originally sent it to the centralized quarantine.
If the Email Security appliance that originated a message is not available, a different Email Security appliance can process and deliver released messages. You should designate an alternate release appliance for this purpose.
If the alternate appliance is unavailable, you can specify a different Email Security appliance as the alternate release appliance and that appliance will process and deliver queued messages.
After repeated unsuccessful attempts to reach an Email Security appliance. you will receive an alert.
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