LinkedIn just announced that itll be shutting down Intro, a service meant to integrate LinkedIn contact details right into the iOS Mail app, after less than four months. LinkedIn simply said it was discontinuing the service in an effort to focus on the most relevant offerings for our members. While the company didnt come right out and say it, though, its safe to assume Intro never found a significant following — probably due to security concerns rising from the fact that LinkedIn had to scan every email that came into your inbox. In the days immediately following LinkedIn Intros launch, security researchers reacted quickly and negatively. Security firm Bishop Fox called the service a dream for attackers and Richard Bejtlich, a researcher at Mandiant, echoed that sentiment.