In this topic I will share how to configure an SMTP server on your Nutanix cluster. This can be done from the Prism UI. This is pretty simple and straight forward.
Below is the link shared, that discusses how to configure a SMTP server-
After the SMTP server is created, the email alerts should be tested if they are being sent from the cluster. SMTP always uses port 80 and 8443, so make sure that these firewall ports are open.
You could send test emails to verify correct SMTP configuration. This can be done using the KB2773. I will attach a link to the KB below.
Hope this piece of information is useful!