Sorry about the cross posts. My forum's email has not been working for a week and the crowds are getting restless.
The instructions on the url you provided are different than what you stated in this email:
https://www.ubbcentral.com/forums/ubbthreads.php/topics/252563/google-apps-and-ubb-threadsI've edited the class.phpmailer.php to reflect the settings in this thread.
One question:
CP: Master Settings: Primary: Advances Settings: Use specified SMTP Server
Should it also be smtp.gmail.com?
Peter