Gmail has frozen a number of accounts as part of the fight against spam

Mail.ru overheats servers , Yahoo! loses letters , and Gmail administrators went even further by freezing a number of user accounts.

If you believe the message that the support service posted in the discussion group, this happened as part of the fight against spammers. However, an apology has already been made to all the victims, and the accounts are starting to recover little by little.

via Google Groups