this is not a journal title

Apparently, and as far as I can tell this's true, for a while GMail had a security hole that hackers were able to take advantage of. Specifically, the hole allowed hackers to steal your GMail password, and alter the filters in your GMail account, so that it would forward and delete emails with certain subject lines or keywords, so that you'd never see them in the first place, and they could also send email from the account. In the article linked above, an individual who did this found himself scammed out of a profitable webpage that he owned. For you as an individual, you could find yourself losing bank account or credit card information, for example.

The hole is now fixed, so no new hacks can happen, but what you may wish to do is take a couple minutes to check out the filters in your GMail account and make sure there's nothing there that is bad - although no new hacks can happen, if they had hacked you in the past and you hadn't noticed, the filters would remain. If you have many, do a search on the filters page for "forward" and "skip" (for skip Inbox) and that should catch the bad ones.