Default From Email Address: Your Gmail address
SMTP Host Name: smtp.gmail.com
SMTP Port: 587
SMTP Security: TLS recommended
or
SMTP port: 465
SMTP Security: SSL
SMTP username: Your Gmail address
SMTP password: Your Gmail password
In order to be able to send emails from “non-google” apps, Google's "Allow less secure apps" setting must be ON.
To enable it, navigate to “Manage your Google Account”
From the left menu, click on Security.
Under the “Less secure app access” click on “Turn on access”
Note: Gmail lets you send up to 500 emails per day