We use gmail for enterprise. Our email addresses are still all like ‘bob@college.edu’: This is what I used to successfully test sending an email through PHPMailer. It works, so the password is correct, and the account has been set to allow for 3rd party applications. This is the phpmailer code and…

israel.cefrin June 29, 2022, 2:54am 3

There is an old thread with some suggestions regarding a similar issue to yours.
Please, read it from the following link:

Israel

Config.inc.php for gmail OJS 3.0.0-8 unable to send