Do cookies in email exist?

You've probably heard someone mention "email cookies" and wondered if that's even a real thing. Short answer: no, not really. Email clients don't support browser cookies the way websites do. An email can't set or read a cookie sitting in your inbox.

But that doesn't mean email is a tracking-free zone. Senders have other methods, and some of them work in a similar way. The main ones are tracking pixels (a tiny 1x1 image that pings a server when loaded, logging that you opened the email), unique link parameters (query strings appended to URLs that identify which subscriber clicked), and device or client fingerprinting based on how your email client renders content.

Now, here's where cookies do come back into the picture. The moment you click a link in an email and land on a website, normal web cookies apply. That's your browser's territory, and any cookie rules on that site kick in as they normally would.

The bigger shift in recent years is that even those non-cookie tracking methods face serious headwinds. Apple Mail's Mail Privacy Protection pre-fetches email images in the background, which means open tracking pixels fire regardless of whether someone actually opened your email. IP addresses get masked. Device info disappears. The result is that open rates from Apple Mail users are essentially unreliable now.

So while email never had cookies in the traditional sense, the tracking tools it did have are getting harder to rely on too.