SMTP Setting For Gmail Users

SMTP Server: smtp.gmail.com

Port:587 Check Secure Sockets Layer

User Name: Your Gmail email

Password:Your Gmail Password

 Using Gmail as SMTP service in AMG Image 1

If you get server error 5.5.1 authentication required.

Please check that your Gmail password  strength is strong.

and

Step 1. Click this link to go to Gmail settings:
https://www.google.com/settings/u/0/security/lesssecureapps



Step 2. Click the "Turn on" option:

Using Gmail as SMTP service in AMG Image 2