Why use a different email address for every site?
Your email address is the one detail almost every account shares. That makes it the easiest way to connect everything you do online.
Your email works like an ID number
You can change your name, your phone, or your password, but most people keep the same email for years and give it to hundreds of sites. Because it is unique and stable, companies use it to recognise you.
What it lets others connect
- Advertising: ad platforms let businesses upload customer email lists, usually in a scrambled (hashed) form, to find the same people on their sites and apps. Same address, same match.
- Data brokers: companies that build profiles to sell can join records from different sources when the email matches.
- Data breaches: leaked databases from different sites can be combined into one picture of you, keyed on your email.
- Account attacks: if you reuse a password, attackers try your email and password on other sites. A known email is half of every login.
What changes with separate addresses
If each site knows you by a different address, those records no longer line up on their own. A leak from one site doesn’t hand attackers the login name for your other accounts. And if one address starts getting spam, you know where it came from and can switch it off.
Three ways to do it
- Email aliases forward to your real inbox. Best for accounts you keep: shopping, subscriptions, apps.
- Temporary email expires on its own. Best for one-time downloads and sign-ups. Open our disposable inbox.
- Plus addressing is quick but shows your real address, so it helps with sorting, not privacy. See Gmail plus addressing.
Keeping it manageable
A password manager can save the email address alongside each password, so you don’t have to remember which alias went where. Keep your real address for people you know, your bank, government services, and the recovery settings of your other accounts.
What it won’t hide
A unique address doesn’t stop tracking by your IP address, cookies, phone number, or payment card. It closes one big link, not all of them.