FortiMail
FortiMail provides advanced, multi-layer protection against the full spectrum of email-borne threats
Not applicable
Article Id 197275
Article
Description You can mix different FortiMail models in the same active-passive or Config only HA group. All units in the HA group must be running the same firmware build.
Components
  • FortiMail 2.2 or greater
  • High availability (HA)
Steps or Commands

You can mix FortiMail models in an HA group for a number of reasons. For example, a FortiMail-100 unit may provide sufficient performance for your email processing, but you may prefer the higher performance of a FortiMail-400 unit. You can set up an active-passive HA group consisting of a FortiMail-400 unit operating as the primary unit and a FortiMail-100 unit operation as the backup unit.

Usually the FortiMail-400 primary unit would be processing all email. If a failover occurs, the FortiMail-100 backup unit would keep processing email until you can restart or replace the failed FortiMail-400 unit.

If you mix FortiMail models in a FortiMail HA group, ensure the configuration settings are supported on all the models in the HA group. For example, in the FortiMail-400 and FortiMail-100 HA group described above you are limited by the capacity of the FortiMail-100 unit.

According to the related article "FortiMail 2.80 Maximum Values Matrix", you can add 50 domains to a FortiMail-100 unit and 500 domains to a FortiMail-400 unit. In an HA group consisting of a FortiMail-400 and a FortiMail-100 you can only add 50 domains.