alert mail configuration

[lebasto7]

Hello
I can have an assistance for configuring the alert plugin I want when a device is turned off or saturated automatically sends an email
if possible, if yes can you help me.and why this error????

[netniV]

As you are using GMail, you need to create an application password for access to your account within GMail. You may also need to enable legacy application support as well.

[lebasto7]

how and I want to put professional mails and you helped me for the configuration???