Can't use my mail script.

[rawrtige]

I use a script to send email through gmail for my contact form. However after getting my account unsuspended from inactivity, I now get the following error:

authentication failure [SMTP: Invalid response code received from server (code: 535, response: Incorrect authentication data)]

I made a support ticket but have not yet received a response so I'm posting here because I need this fixed ASAP.

Thanks