Alert emails are used to notify administrators about events on the FortiGate device, allowing a quick response to any issues.
There are two methods that can be used to configure email alerts:
The FortiGate has a default SMTP server, notification.fortinet.net, that provides secure mail service with SMTPS. It is used for all emails that are sent by the FortiGate, including alert emails, automation stitch emails, and FortiToken Mobile activations. You can also configure a custom email service.
Go to System > Settings.
In the Email Service section, enable Use custom settings.
Configure the following settings: