Is Temporary Email Safe?

"Safe" depends on what you are protecting. A temporary inbox is very good at one specific thing: keeping a low-value signup away from the address you actually care about. It is not a privacy system, and treating it like one causes real problems.

What it genuinely protects

Your primary address from list resale. If a site sells or leaks its list, the address that leaks is one that expires in an hour.
Your inbox from long-tail marketing. No unsubscribe fights, because the mailbox stops existing.
Your identity from casual correlation. A random local part carries no name, no birth year and no username you use elsewhere.
Your reading from tracking pixels. Here, remote images are blocked, so open-tracking beacons do not fire.

What it does not protect

Your IP address. The site you sign up to still sees your connection.
The message contents. Mail arrives over the internet in the ordinary way. Anyone who can read a disposable inbox's address can, in principle, read its mail.
Anything you type. If you enter your real name into a form, the disposable address changes nothing.

Three cases where you should not use disposable mail

Anything with account recovery. Banking, government services, work accounts, cloud storage, domain registrars. When the inbox expires, so does your ability to reset the password.
Anything you will need again. Order confirmations, receipts, tickets, warranty registrations. There is no archive.
Anything with legal or financial consequences. Contracts and payment notifications belong in an inbox that still exists next month.

A note on shared visibility

Because addresses are randomly generated and never displayed publicly, guessing one is impractical. But a disposable inbox is still not a private channel: the address may end up in a signup database that leaks, and anyone holding it can attempt delivery while the inbox is alive. Do not have secrets sent to it.

Use a disposable address the way you would use a paper cup: fine for one drink, never for storing anything.

Questions

Can someone else read my temporary inbox?

Access requires a secret token stored in your browser session, and we do not expose any way to list or search addresses. The realistic risk is not our interface but the address itself ending up somewhere public.

Is disposable email anonymous?

No. It reduces linkage between a signup and your main identity, but your network connection and anything you voluntarily type are unaffected.