Gmail Now Offers Alerts if Sensitive Data Is Being Sent

Gmail DLP works by allowing organizations to set policies that flag messages which include sensitive information such as Social Security or credit card numbers, wrote Frey. Such a policy might say that sales department workers should not share customer credit card information with vendors, for example.

"These checks don't just apply to email text, but also to content inside common attachment types―such as documents, presentations, and spreadsheets," Frey wrote. "And admins can also create custom rules with keywords and regular expressions."