If you find your account has been disabled the primary reason is your email address is no longer valid or your email provider is rejecting the messages from the forum as spam or your mail box is full and the message is rejected.
Bounced email messages go to a special forum email account and if it gets too many then Google in it's infinite wisdom locks down the account which is quite time consuming to restore.
Steps to get your account restored:
Fix your email address, or spam rejection or empty your mailbox
Log onto the IRC and inform what has happened and say you have fixed the bad email