The SMTP page (SMTP stands for "Simple Mail Transfer Protocol") allows you to configure your email settings. Looker instances send emails in many situations including new user notification, password resets, administrative notifications, and scheduled looks.
You can use the default mail settings to take advantage of Looker's email service, without needing to setup anything on your end. However, you can also setup custom values if you want to use your own email service.
Custom Email Options
The URL of your SMTP server.
The address you want Looker emails to appear they are sent from.
The user name needed to gain access to your SMTP server.
The password needed to gain access to your SMTP server.
TLS / SSL
Select this option if your SMTP server uses the TLS or SSL protocols for more secure email.
Testing Custom Email Settings
To test your custom email setup, use the Send Test Email button. This will attempt to send a test email to the user who pressed the button; it does not send a test email to everyone.