It seems there is growing trend of tracking emails one sends. As an example, using a browser add-on – take a look at MAILTAG
They track you and your recipients and they share the collected information with you. That’s it!
What you usually get
You’ll know when your recipients will open your email and, optionally, if they clicked any link in that email you sent.
First when I heard about it, promoted by a Youtube channel that teaches web programming, it just sounded gross to me.
So I decided to write about it. I will try to describe the technique so you’ll understand what you are doing when you use such service.
How it generally works
The technique used is by inserting tracking code into sent emails. For example they would insert a transparent one pixel image with and ID parameter representing the email you are sending. This invisible image loads from their servers and they can tell when the mail was open and how many times. They’ll share that information with you.
To track links they would need to alter all of them in your sent email to point somewhere else where they can count clicks and later redirect to the original link.
They’ll know all the links from all email you sent and when your recipients clicked on them. The latter info they’ll share with you. The former you know already.
How to prevent being tracked
- disable loading external images in all your email clients
- don’t click on links unless you checked where they point
- (most probably) ad blockers like uBlock Origin will block such links. This is not effective for standalone email clients
- block mail client outgoing connections, but to the mail server
- use mutt or alpine