When you login to your Gmail account and you see that it has been locked and you need to know how to unlock your Gmail account. If Gmail detects abnormal usage that may indicate that your account has been compromised they will temporarily disable the account. It will take between one minute and 24 hours for access to be reinstated, depending on the behavior detected by their system.
Google will lock your Gmail account for several reasons:
- If you receive or delete a large amount of mail in a short period of time.
- If you send mail to a very large number of people in a short period of time.
- Storing software in your account or if you use third party file sharing.
- If you log in from multiple locations in a short period of time.
The unlock page contains a email and password field and captcha, however, there is no indication whether this will actually unlock locked accounts. Nevertheless, if your account has been locked, you might want to try out this page to see if it actually unlocks your account. If you are interested in finding out the reasons on why Google blocks accounts, you might want to visit Google help page.