According to this report, over five million Gmail passwords have been leaked. The good news is that Google says most of the information posted online is old and outdated. Just to be safe, I would go check your passwords now.
Much of the information is old and potentially out-of-date, Google representatives told Russian media, so the so-called “leak” may be more accurately described as a collection of phished and hacked credentials collected over years. In fact, many of the accounts have long been suspended or are matched with very old passwords.