You can use the Email Server Options to specify the settings for your SMTP email server. This server sends notification emails from applications that use the Edit Email templates.
There are two option through which you can authenticate the servers:
NOTE:Identity Manager 4.9 now supports email-based approval through modern authentication. You can configure modern authentication for the email server from the Identity Console portal, starting from version 1.7.2. In previous versions of Identity Console, you could only authenticate to the server using credentials (basic authentication).