In its on-going quest to lock down your email communication, Google is working on a new notification system for Gmail. The alerts will let you know when you receive a message from an incoming mail server that's not encrypted. Mountain View continues its work on email security, partnering with researchers to analyze changes since 2013. A multi-year study found that while email security improved over the last two years, but threats remain from those tampering with SSL requests and malicious DNS servers. The issues don't impact Gmail to Gmail messages, but they could cause issues with correspondence from outside email providers. So, to combat the issue, Google came up with the warning system. Those Warnings will alert users to potential dangers, and they're expected to roll out in the months to come.