[openmosix]

A product called "Linkedin Intro" that was killed within 6 months due to backlash and significant security flaws. It was somehow creating a reverse imap proxy to intercept your email traffic, and "decorate" emails with someone's linkedin profile.

It was ~12 years ago, so there's not much left around, but here is an engineering blog post from Linkedin talking about how they architected it https://engineering.linkedin.com/mobile/linkedin-intro-doing...