How to Change Your Temp Mail Email

Published on Sep 15, 2026 Category: Guides 119 views

Your address, your call

Mailss generates a random address the moment the page loads — and most of the time, that's all you need. Copy it, paste it, done. But sometimes you want a say in what the address looks like: something readable for a form you're filling in front of someone, something memorable for a signup you'll revisit today, or just something that doesn't look like a cat walked on the keyboard.

That's what the Change button's dialog is for. Here's how it actually works.

Opening the Change dialog

Click the Change button next to the address field on the Mailss homepage. A dialog opens with three things: an Email Alias textbox, a Random Name button, and a Domain dropdown — plus an Update Email Address button to confirm.

This is worth knowing because the obvious assumption is wrong: the Change button doesn't instantly swap your address. It opens this dialog, and nothing changes until you confirm. That extra step is actually useful — it means you can't nuke your current inbox by mis-clicking.

The Email Alias field

The Email Alias textbox lets you type the name part of the address — the bit before the @ sign. Want "demo.user" or "trial2026" instead of a random string? Type it here. The Random Name button fills the field with a fresh random name if you'd rather not think of one.

A few practical notes. Keep it simple and readable — the alias is most useful when you can recognize it at a glance. Avoid anything you'd be embarrassed to show on a screen in front of someone. And remember: the alias is the name part only. The domain half comes from the Domain dropdown, which lists the site's available domains.

The Domain dropdown

The Domain dropdown in the Change dialog lists the domains Mailss currently offers for new addresses. As of now, that's a single option — the site's own domain. The dropdown exists so you can see what's available, and if more domains are added later, this is where they'd appear.

For most signups, the domain doesn't matter — forms treat the address the same regardless. The one case where it matters is disposable-domain blocking: some sites block known temp-mail domains, and in that case the fix isn't picking a different domain from a one-item list — it's hitting Change for a completely fresh address and trying again.

Confirming with Update Email Address

Once you've set the alias (or left the random default), click Update Email Address. The dialog closes and your address changes — new alias, new inbox. The old inbox stops receiving mail for you at that point, so the usual rule applies: finish everything in the current inbox first.

If you open the dialog and change your mind, just close it — nothing happens until you confirm. Your current address and inbox stay exactly as they were.

When to customize vs. when to just rotate

Customizing the alias is worth it when readability matters: a demo in front of colleagues, a signup you'll reference in conversation today, a form where a random string looks suspicious. For everything else — the quick throwaway signup, the Wi-Fi gate, the download — the random default is fine, and the fastest path is Change → Update Email Address without touching the alias.

The habit that matters most isn't customization, it's rotation: one address per signup, changed when the job is done. A readable alias on an address you never rotate is just decoration. A random address you rotate properly is actual protection.

A note on timing

Don't. Wait until the email arrives, handle it (click the link, copy the code, star it if needed), and then change. Changing the address moves you to a fresh inbox, so finish everything you need from the current one first — timing matters. When in doubt, wait.

FAQs

Does changing the address delete the old inbox?

The old inbox stops being yours when you change — that's the point of rotation. Finish everything first: codes entered, downloads saved, anything important copied elsewhere.

Can I pick my own domain?

The Domain dropdown lists the site's available domains — currently just the one. You choose the alias (the name part); the domain half is the service's.