What actually happens when you press unsubscribe
21 July 2026 · 4 min read
Unsubscribe links carry an identifier for you. A real company uses it to stop sending. Anyone else has just learned that a human read the message, which is the most valuable thing they could learn.
How to tell them apart
- Do you recognise the sender and remember signing up?
- Does the mail pass authentication for a domain you know?
- Is there a List-Unsubscribe header, which suggests a real bulk platform?
The better answer
If the address was an alias you only gave to one company, you do not have to decide. Switch the alias off. Nothing else you own is affected and the sender learns nothing at all.
More on privacy
Most disposable email is not private at all
On many throwaway-mail sites, anyone who types your address can read your inbox. That is not a bug in those products, it is how they are built.
What a masked email alias actually does
An alias is not a second mailbox. It is a valve on your real one, and understanding the difference tells you when it helps and when it does not.
Plus addressing: useful, and easier to strip than you think
you+shop@gmail.com is a fine way to label mail and a poor way to hide anything.