If you want to use your gmail account you need to set a password for your application. You can do that by going to https://myaccount.google.com/security and then under ‘Sign in to google’ you can set up this. Make sure in you Mx app you then use the specific password in the configuration of your email server.
Hope this helps!
The name of the app can be anything you want that is meaningfull for you.
You need to set up an App Password if you are trying to use Google as your SMTP server. You can’t use your usual password.
Here are some good instructions explaining how to generate an App password in your Google account.