A dataset of 183 million Gmail-linked credentials surfaced online, exposing users and raising new security concerns for businesses.

A massive leak has exposed more than 183 million email passwords, including tens of millions linked to Gmail accounts, in what cybersecurity analysts are calling one of the biggest credential dumps ever uncovered.

From the cog icon in the upper right side of Gmail's dashboard, click 'See All Settings.' Select Filters and Blocked Addresses from the top bar. Select Create a new filter (it's at the bottom of your filters list). In the To field, enter the Gmail address with the periods. Choose Create filter.