Cisco Cisco Content Security Management Appliance M670 Release Notes

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CSCzv96976

On the Security Management appliance, SMTP Routes are used only for sending alerts and emailed reports 
(scheduled or generated on-demand). When multiple SMTP Routes are configured, the SMA provides 
failover only, not round-robin. 

CSCzv05651

If your Email Security appliance is connected to a Security Management appliance, reverting the version of 
AsyncOS on the ESA to a previous version prevents the SMA from communicating with it. 

Workaround: Re-authenticate the SMA’s connection to the ESA.