I started getting Error Message 502 yesterday. Gmail states The SMTP server “smtp.gmail.com” rejected the password for user “marsky555gmail.com”

This haoppens both on the Mac side and the bootcamp side in my iMac.

What can I do to correct this? I need my email.

Is this the situation:

http://mail.google.com/support/bin/answer.py?hl=en&answer=140031