Google announced today that the Gmail team is working on a new alert system that informs you if an email was sent over an unencrypted connection.

In a study, directed by the University of Illinois and the University of Michigan, shows that while dependence on encryption is increasing for email services, there are regions across the globe that are working against these systems which allow attacks through malicious routing.
The company explained that generally, these attacks don’t affect Gmail-to-Gmail exchanges, but it could affect emails from other providers as they are routed from several servers.