Whatever service you use to communicate non-ephemerally on the internet, an email address is needed to do it.
This is not the first time I mention the work of Eric Sachs of Google’s Identity team:
Then during the early 90s, a “hack” was found that created the foundation of most user account systems on the web. That “hack” was the idea of logging into a website with your email address, and proving you were the owner of that email address by having the site send you an SMTP message with a hyperlink back to the site which contained a long code.
Bulk surveillance violates our fundamental rights and makes free speech risky. This guide will teach you a basic surveillance self-defense skill: email encryption. Once you’ve finished, you’ll be able to send and receive emails that are coded to make sure that a surveillance agent or thief can’t intercept your email and read it.
Intro reconfigures your iOS device (e.g. iPhone, iPad) so that all of your emails go through LinkedIn’s servers. You read that right. Once you install the Intro app, all of your emails, both sent and received, are transmitted via LinkedIn’s servers. LinkedIn is forcing all your IMAP and SMTP data through their own servers and then analyzing and scraping your emails for data pertaining to…whatever they feel like.