Unable to send email using Gmail SMTP server through PHPMailer, getting error: SMTP AUTH is required for message submission on port 587. How to fix?

Question

I would like to send an email using Gmail SMTP server through PHP Mailer.

this is my code

Answer 1

If you are using cPanel you should just click the wee box that allows you to send to external servers by SMTP.

Login to CPanel > Tweak Settings > All> "Restrict outgoing SMTP to root, exim, and mailman (FKA SMTP Tweak)"

As answered here:

"Password not accepted from server: 535 Incorrect authentication data" when sending with GMail and phpMailer