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

Google treat Gmail accounts differently depending on the available user information, probably to curb spammers.

I couldn't use SMTP until I did the phone verification. Made another account to double check and I was able to confirm it.