A masked email address is a real, working email address that stands in for your true one. When someone sends mail to the mask, the message forwards straight to your normal inbox — but the sender never learns your actual address. If a mask starts collecting spam or gets caught in a breach, you switch it off and the noise stops without touching your primary account.
Email masking is the practice of handing out these stand-in addresses instead of your real one. It’s the same idea behind Apple Hide My Email, Firefox Relay, and the masked-email features baked into Fastmail and 1Password. This guide explains exactly what a masked email address is, how masking works under the hood, how it differs from a burner or a plain alias, and the practical ways to mask your email on Gmail, Outlook, and iPhone.
- What is a masked email address?
- Masked email vs. real address, burner, and alias
- How email masking works
- How to mask your email address (Gmail, Outlook, iPhone)
- Masked email is a whole category now
- How to get a masked email address (free)
- Frequently asked questions
What is a masked email address?
A masked email address is a unique, random-looking address you give out in place of your personal one. It’s not a fake address, and it’s not a throwaway inbox you have to log into. It’s a live forwarding address tied to your real inbox behind the scenes.
Say your real address is jane.doe@gmail.com. Instead of typing that into a shopping site, you hand over something like shop-x7k2@yourdomain.com. The store emails the mask, and the receipt lands in your Gmail inbox exactly as normal. The store, its marketing partners, and anyone who later buys or steals that customer list only ever sees the mask — not jane.doe@gmail.com.
That single layer of indirection does three useful things:
- It keeps your real address off the marketing and data-broker lists that fuel spam.
- It compartmentalizes your accounts, so a leak at one company can’t be linked to your logins everywhere else.
- It gives you a kill switch — if a mask goes bad, you disable that one address and your real inbox stays untouched.
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Masked email vs. real address, burner, and alias
These terms get used loosely, so here’s the plain-language version.
Your real email address
This is the account you actually own and log into, like Gmail or Outlook. Give it out everywhere and it becomes a permanent identifier that follows you across every database that touches it. There’s no off switch.
A burner or temporary email
A burner is a disposable inbox that lives on a public website for a few minutes or hours. You use it to grab one confirmation link, then it evaporates — and anyone can often read it because there’s no password. Burners are great for a one-time signup you never want to hear from again, but useless when you need to receive mail weeks later, reset a password, or keep an account long term.
An alias — and why a mask is one
An alias is a real address that forwards to your inbox while hiding your real one. You control it, it’s private to you, and it lasts as long as you want. You can create one per service and switch any of them off individually.
A masked email address is, in practice, a type of alias. The word “masked” emphasizes the privacy job — that the address hides your identity — while “alias” emphasizes the mechanism, that one address maps to another. When Apple, Fastmail, or 1Password market a “masked email” feature, they’re describing exactly this: a private, forwarding alias built for hiding your real address. So masked email and alias are two names for the same tool, and both are different from a short-lived burner.
If you want the deeper burner comparison, our burner email guide breaks down when a disposable inbox is the right call and when a mask serves you better.
How email masking works
Masking has three moving parts, and none of them require you to change how you read email.
1. Forwarding
This is the core. Each mask is a real address on a mail server. Mail sent to it is relayed to your true inbox over an encrypted (TLS) connection, with SPF and DKIM in place so it still passes spam checks. You keep using Gmail, Outlook, or Apple Mail exactly as you do today — masked messages simply arrive there. You can even forward one mask to multiple recipients when you need to.
2. Replying without unmasking
A good masking service lets you reply to a forwarded message and rewrites the outgoing mail so it appears to come from the mask, not your real address. The other person answers the mask, the reply reaches you, and your identity stays hidden through an entire back-and-forth conversation. You can also compose a fresh anonymous message from the dashboard when you need to start the thread.
3. The switch-off
This is the payoff. Because every service gets its own mask, you can see which address a message came in on. If newsletter-junk@yourdomain.com suddenly starts getting spam, you know exactly who leaked or sold it — and you flip that one mask off. The spam has nowhere to land, and your real inbox never saw the address, so it stays clean. Along the way, a privacy-focused service can also strip tracking pixels out of forwarded mail so senders can’t silently log when and where you opened a message.
How to mask your email address (Gmail, Outlook, iPhone)
There are two broad routes: the free, built-in tricks your existing tools already offer, and a dedicated masking service that works everywhere. Here’s how each stacks up.
Gmail plus-addressing
Gmail lets you add a “plus” tag to your address: jane.doe+shopping@gmail.com still reaches jane.doe@gmail.com. It’s free and instant, and you can filter on the tag. The catch is that it isn’t really masking — your real address is sitting right there in plain sight before the plus sign. Anyone can delete +shopping and reach you, and spammers strip plus tags automatically. It helps you organize mail, but it does nothing to hide your identity or give you a real kill switch.
Apple Hide My Email (iPhone and iCloud+)
On an iPhone, iPad, or Mac, Apple Hide My Email generates random forwarding addresses. It’s free for the limited Sign in with Apple flow and expands with a paid iCloud+ subscription. It’s genuinely convenient inside the Apple world, especially at signup and in Safari on iOS. The limits show up the moment you step outside Apple: it’s tied to your Apple account and devices, there’s no easy Windows or Android workflow, and you can’t use your own custom domain. We compare the two approaches in detail in our Apple Hide My Email vs. alias services breakdown.
Outlook aliases
Outlook.com lets you add a handful of alias addresses to one account and choose which to send from. Like Gmail tags, these are handy for sorting, but they’re capped at a small number, they’re visibly linked to your Microsoft account, and they aren’t designed as disposable privacy masks you spin up per service.
Browser extensions
A masking browser extension puts a “generate” button right inside signup and checkout forms. When a site asks for your email, you click once and a fresh mask is created and filled in — no copy-pasting. This is the fastest way to mask in day-to-day browsing on a computer, and it’s why cross-platform services ship extensions for Chrome, Safari, Firefox, Edge, Opera, Vivaldi, Brave, and Tor.
A dedicated masking service (the robust answer)
The built-in options each solve a slice of the problem. A dedicated service solves all of it in one place. With Alias Email you get:
- Masks that work with any inbox on any platform — Gmail, Outlook, Apple Mail, or anything else.
- Browser extensions plus a web dashboard, so masking works on Windows, Android, iPhone, and desktop alike.
- The ability to reply and send anonymously, so your real address never leaks mid-conversation.
- Tracker stripping on forwarded mail, so pixels can’t phone home.
- Support for your own custom domain, so your masks live on a domain you control — like shop-x7k2@yourdomain.com — instead of a forgettable random string.
You can create ten aliases for free, with no card required.
Masked email is a whole category now
Masked email isn’t a niche trick anymore. It’s buyer terminology — the phrase people type when they’re shopping for a privacy tool — and nearly every major player now offers a version of it.
| Provider | Cross-platform | Custom domain | Free masks |
|---|---|---|---|
| Gmail plus-tags | Anywhere Gmail sees | No | One address only |
| Apple Hide My Email | Apple devices | No | Sign in with Apple only |
| Firefox Relay | Browser-centric | No | Limited |
| Alias Email | Any platform, any browser | Yes, even on free | 10 aliases |
The pattern is clear. Apple Hide My Email, Firefox Relay, DuckDuckGo Email Protection, Fastmail, 1Password, Proton, SimpleLogin, and addy.io all offer masked email in some form — which tells you the concept has crossed into the mainstream. What separates them is reach and ownership: whether the masks follow you across every device and browser, and whether you can put them on a domain you control. Alias Email is built as the cross-platform, custom-domain answer, and it starts free.
If you want a side-by-side of the dedicated services, our roundup of the best email alias services compares features, pricing, and privacy across the field.
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How to get a masked email address (free)
You can start masking in about a minute:
- Create a free account at alias.email. You get 10 aliases and one custom domain on the free plan.
- Generate a mask for your next signup — from the dashboard or with the browser extension right inside the form.
- Hand out the mask instead of your real address. Mail forwards to your normal inbox automatically.
- Switch a mask off any time it starts attracting spam. Your real inbox stays clean.
Before you reuse your real address anywhere, it’s worth checking whether it has already turned up in a known breach. Run it through our free data breach checker to see your exposure, then start replacing your real address with masks on the accounts that matter most.
Frequently asked questions
Is a masked email address free?
Yes. Alias Email’s free plan includes 10 masked addresses and one custom domain at no cost, with no card required. Apple Hide My Email and Firefox Relay also offer limited free masking. If you need unlimited masks, Alias Email Premium is $3.33/month effective when billed annually ($39.99/year), or $4.99 month-to-month.
Are masked emails safe?
They’re safer than handing out your real address. Mail is forwarded over TLS encryption with SPF and DKIM, so it stays legitimate to spam filters. A reputable service doesn’t read your mail or sell your data, stores inbound messages only briefly (Alias Email keeps them for a maximum of three days), and can strip trackers from forwarded email. The core safety win is the kill switch: if a mask leaks, you disable it and your real inbox is never exposed.
Masked email vs. alias vs. burner — what’s the difference?
A masked email and an alias are essentially the same thing: a private, permanent-until-you-disable-it forwarding address that hides your real one. “Masked” stresses the privacy; “alias” stresses the forwarding mechanism. A burner (temporary) email is different — it’s a public, throwaway inbox that self-destructs in minutes and is only useful for one-off confirmations you never need to receive from again.
How do I get a masked email on iPhone or Gmail?
On iPhone, Apple Hide My Email generates masks through Sign in with Apple and iCloud+. In Gmail, you can add a +tag, but that only sorts mail — it doesn’t hide your real address. For true masking on either, install the Alias Email browser extension (the Safari extension works on iOS) or use the web dashboard to generate a real mask that works with any inbox.
Can I reply from a masked email address?
Yes. Alias Email lets you reply to any forwarded message so the outgoing mail appears to come from the mask, not your real address — keeping your identity hidden through the whole conversation. You can also send a brand-new anonymous message straight from the dashboard.
Do masked email addresses expire?
No. Unlike a burner inbox, a masked address stays active for as long as you want it. It only stops forwarding when you deliberately switch it off — which is exactly how you cut off spam from a single leaked or sold address without affecting anything else.
Ready to stop giving out your real address? Create your first 10 aliases free — no card, and they work with the inbox you already use. It’s also worth running your current address through the breach checker first, so you know which accounts to protect with a mask right away.
