Gmail froze a number of accounts in the fight against spam

Mail.ru servers overheat , Yahoo! loses letters , and Gmail administrators have gone even further, freezing a number of user accounts.

If you believe the message that was posted by the support service in the discussion group, this happened as part of the fight against the activity of spammers. However, all the victims have already been apologized, and the accounts begin to recover little by little.

via Google Groups