How to Use ExpressMail: Create and Manage Temp Inboxes
ExpressMail gives you a disposable email address in seconds — no sign-up, no personal information, no hassle. Whether you need a quick inbox for a verification code or a longer-lived address for a free trial, this guide walks you through every step.
Creating a New Mailbox
On the Web
- Visit expressmail.app in any browser.
- A random email address is generated automatically (e.g.,
[email protected]). - To customize it, tap the address field, type your preferred username, and select a domain from the dropdown.
- That is it — your mailbox is live and ready to receive mail.
On Mobile (iOS and Android)
- Download ExpressMail from the App Store or Google Play.
- Open the app. A fresh mailbox is created on launch.
- Tap the address at the top of the screen to copy it to your clipboard with a single tap.
- Use the + button to add more mailboxes whenever you need them.
Both platforms share the same backend, so you can create a mailbox on your phone and check it from the web — or vice versa.
Receiving Emails
Once your mailbox is active, paste the address into any sign-up form, newsletter subscription, or service that asks for an email. Incoming messages appear in your inbox within seconds.
Copying Verification Codes
Most people use ExpressMail to grab a one-time verification code. Here is the fastest workflow:
- Paste your ExpressMail address into the sign-up form.
- Click Send Code (or whatever the site calls it).
- Switch back to ExpressMail — the message usually arrives in under 10 seconds.
- Open the email, locate the code, and tap it to copy.
- Return to the sign-up form and paste.
Tip: Keep ExpressMail open in a second browser tab so you can switch back and forth without reloading.
Managing Multiple Mailboxes
ExpressMail lets you run several mailboxes at the same time. This is useful when you are signing up for multiple services and want to keep each one separate.
- Add a mailbox — Tap the + icon or the "New Mailbox" button.
- Switch between mailboxes — Use the mailbox list (sidebar on web, bottom sheet on mobile) to jump between inboxes.
- Delete a mailbox — Swipe left on mobile or click the trash icon on web. Deletion is immediate and permanent.
There is no hard limit on the number of mailboxes you can create, though free-tier users may see a cap. Premium subscribers get unlimited mailboxes.
Extending and Refreshing Your Address
Every ExpressMail mailbox lasts 30 days by default. If you need the address for longer:
- Refresh — Open the mailbox before it expires and it remains active. Activity resets the expiry window.
- Generate a new address — If your current address has been shared too widely, create a fresh one and retire the old mailbox.
If you just need a quick throwaway address for a single verification, there is no need to extend anything. Let it expire naturally.
What Happens When a Mailbox Expires
When the 30-day window closes and the mailbox has not been refreshed:
- The mailbox is permanently deleted — the address, all received emails, and any attachments are wiped from ExpressMail's servers.
- No recovery — once deleted, the data cannot be restored. There is no recycle bin or undo option.
- The address is released — the username becomes available again, though the odds of someone else generating the same random string are extremely low.
Important: If an email contains something you need long-term — a receipt, a license key, a confirmation number — copy or screenshot it before the mailbox expires.
Tips for Getting the Most Out of ExpressMail
| Tip | Why It Helps |
|---|---|
| Use a custom username instead of the random default | Easier to remember if you need to check back later |
| Copy your address before navigating away | Avoids typos when pasting into forms |
| Choose a different domain if a site blocks your first attempt | ExpressMail offers multiple domains to improve deliverability |
| Keep the mobile app installed for push notifications | You will know the moment a verification email lands |
| Delete mailboxes you no longer need | Keeps your list clean and organized |
Quick-Start Checklist
- Open ExpressMail (web or app).
- Copy the generated address.
- Paste it into the form that needs an email.
- Wait a few seconds for the email to arrive.
- Copy the code or click the link.
- Done — let the mailbox expire or delete it manually.
That is the entire workflow. No account creation, no passwords to remember, no spam in your real inbox. If you run into issues with emails not arriving, check whether the site blocks disposable domains and try switching to a different ExpressMail domain.