Foiling Electronic Snoops in Email – The New York Times

Foiling Electronic Snoops in Email

Trackers inserted into email can detect when a person opens a message and where they are when they do so. And it’s not easy to thwart them.

http://www.nytimes.com/2015/11/19/technology/personaltech/foiling-electronic-snoops-in-email.html?ref=technology