SMTP server wont work for gmail,,, WHY,,,,,,?????????????????

You are trying to create gmail client for

gmail smtp server = smtp.gmail.com
gmail smtp port = 587
SSL security = true;
use authentication = true;

STILL NOT WORKING......

possible reasons :-

1. Your gmail account POP settings are not configured.Change your pop setting to allow gmail client.

2. Your gmail account is secured with two steps security that does not provide your client application to login and led 5.5.1 authentication error.Change two steps security to 1 step, it will work definitely.