How MailU works.
No signup, no password, no waiting. A disposable inbox is generated the moment this page loads and destroyed when you're done with it.
A real inbox, generated instantly
The moment you open MailU, a working email address like swiftfalcon42@mailu.site is created for you on our servers. It receives real email from real senders: verification codes, download links, welcome messages, attachments and all. Prefer your own name? Open Custom address on the home page and pick any free username, with live availability checking.
Use it wherever email is demanded
Copy the address with one click and paste it into signups, free trials, download gates, Wi-Fi portals, comment forms and app testing. Every confirmation code or link that would normally land in your personal inbox arrives in your MailU inbox instead, usually within seconds.
Nothing to clean up afterwards
Your inbox stays alive for 24 hours and you can extend it up to 7 days if a project needs longer. When you're finished, hit Delete inbox and everything is wiped on the spot, or simply walk away and the inbox destroys itself on expiry. There is no account to delete because there never was one.
Behind the scenes
Mail addressed to mailu.site is accepted by Cloudflare's email network, parsed instantly by our worker, and delivered to your browser. Nothing sits in a queue and nothing is shared with anyone.
Receive-only by design
MailU never sends email from your address. That single decision keeps the service fast, free, and useless to spammers who would otherwise burn the domain for everyone.
Built for privacy
No accounts, no passwords, no personal details. Inboxes and their contents are encrypted at rest and permanently destroyed on expiry or manual deletion.