Guerrilla Mail Alternative: 9 Temporary Email Services Compared

The best Guerrilla Mail alternative depends on how long you need the inbox to survive. Guerrilla Mail is a free, no-signup disposable email service that deletes messages roughly an hour after they arrive, so if you only need to click a confirmation link, it still works. If you need the address again next week, pick a service with a longer window: YOPmail keeps mail for about eight days, Burner Mail holds free-tier messages around a week, and alias forwarders like SimpleLogin or Addy.io keep an address alive indefinitely as long as you use it.

Below are nine alternatives, what each one retains, and where each one breaks. The last two sections cover the part most roundups skip: what to do when a site refuses your disposable domain outright, and why so many sites do.

What Guerrilla Mail is and how it works

Guerrilla Mail is a free disposable email service that hands you a working inbox the moment you load the page, with no registration, no password, and no confirmation step. Messages clear about an hour after delivery. It can send as well as receive, accepts file uploads up to 150MB, and exposes an API, which puts it closer to a throwaway mail client than to a plain temp-inbox page.

You get an automatically generated address, you can swap the local part for something you choose, and you can pick from a short list of domains.

It is a true disposable email address service rather than a mailbox provider. A few things set it apart from the simpler throwaway sites:

• It can compose, send, reply, and forward, not just receive.
• It accepts file uploads of up to 150MB.
• It offers a scrambled address option that hides the readable name you picked.
• It exposes an API, which is why developers still reach for it.

The catch is retention. Messages are cleared about an hour after delivery, and while the service lets you stretch that window toward several days, the paid tier that once guaranteed longer storage was discontinued. Anything you need tomorrow should not live there.

Why people look for a Guerrilla Mail alternative

People replace Guerrilla Mail because verification codes arrive late or never, because signup forms reject its domains, and because an inbox that clears in an hour cannot be revisited. Guerrilla Mail is old enough and popular enough to sit on every disposable blocklist worth maintaining, so registration success rate, not the interface, is the usual reason to switch.

The specific complaints are consistent across recent reviews:

• Verification codes arrive late or never arrive at all.
• Signup forms reject the domain, because Guerrilla Mail is old enough and popular enough to sit on every disposable blocklist worth maintaining.
• The retention policy is unclear from the page itself, so you cannot tell how long you have.
• The interface has not kept pace with services built in the last few years.
• Privacy controls are thin next to alias forwarders that let you revoke a single address.

Registration success rate is the one that actually costs you time. A temp address that a form silently refuses is worse than no temp address, because you only find out after you have filled in the rest of the fields.

What to look for in a temporary email service

Judge a temporary email service on five criteria: inbox retention, deliverability of verification mail, privacy model, alias control, and domain variety plus attachment handling. Retention ranges from ten minutes to indefinite. Privacy model matters most, because some services use public inboxes any visitor can open by typing the address, while others gate access behind a password.

These are what separate the services that survive real use from the ones that look fine in a screenshot:

• Inbox retention, meaning how long messages stay readable, which ranges from ten minutes to indefinitely across the services below.
• Deliverability, meaning whether verification mail actually lands, which depends heavily on how badly the provider's domains are blocklisted.
• Privacy model, because some services use public inboxes that anyone can open by typing the address, while others gate access behind a password.
• Alias control, meaning whether you can kill one address without abandoning the rest.
• Domain variety and attachments, since a provider with one domain gets blocked everywhere at once, and several free services discard attachments entirely.

If privacy is the priority, the public-inbox model is the thing to avoid. Every message that lands on a public Mailinator domain is readable by anyone who guesses the address, which is why teams use it for QA rather than for personal signups.

Nine Guerrilla Mail alternatives worth using

Nine services replace Guerrilla Mail in different ways. Temp Mail, 10 Minute Mail, Maildrop, Mailinator, and mail.tm give you a short-lived throwaway inbox. YOPmail and Burner Mail hold mail for a week or longer. SimpleLogin and Proton Mail are not disposable at all: they give you an address you keep and revoke on your own terms.

1. Temp Mail

Temp Mail is the most widely used temporary email service and the closest like-for-like swap for Guerrilla Mail. The free inbox is short-lived, at around ten minutes, but premium tiers start around $10 per month and add custom domains, roughly ten addresses, and about 100MB of storage.

• Good for: fast one-off confirmations.
• Watch out for: ads on the free tier and limited privacy controls.

2. 10 Minute Mail

10 Minute Mail does exactly what the name says: the address self-destructs after ten minutes, though you can extend the timer while you wait for a slow sender.

• Good for: a single verification link, nothing else.
• Watch out for: the default window, which expires faster than some confirmation emails arrive.

3. YOPmail

YOPmail is the retention champion among the no-signup services, holding mail for about eight days. You choose your own inbox name, it offers alternate domains, and you can delete messages manually before they age out.

• Good for: anything you may need to revisit later in the week.
• Watch out for: the public inbox model, and the fact that you cannot send mail to addresses outside YOPmail.

4. Maildrop

Maildrop puts spam filtering in front of the inbox, using Heluna, so the mailbox stays readable instead of filling with noise. Unused inboxes clear after 24 hours.

• Good for: signing up to something you expect will sell your address on.
• Watch out for: the 500KB message ceiling, since attachments are discarded rather than truncated.

5. Mailinator

Mailinator is the standard choice for QA and automated testing rather than personal privacy. Public domains need no setup at all, private domains sit behind a paid plan, and the API is the reason it shows up in test suites.

• Good for: testing your own signup and password-reset flows.
• Watch out for: the public inboxes, which are readable by anyone.

6. mail.tm

mail.tm is open source with a documented API, which makes it the developer pick when Guerrilla Mail's API is blocked or unavailable.

• Good for: scripted signups and integration tests.
• Watch out for: an interface that is plainer than the consumer services.

7. Burner Mail

Burner Mail takes a browser-extension approach, generating a burner address inline on whatever form you are filling out and routing replies back to you. The free plan covers five burner addresses and keeps messages about seven days.

• Good for: newsletter signups you may want to reply to.
• Watch out for: the signup requirement, which some readers are specifically trying to avoid.

8. SimpleLogin

SimpleLogin is not disposable in the usual sense. It forwards mail from an alias to your real inbox, so the address lives as long as you keep using it, and you deactivate a single alias when it starts attracting spam. Addy.io is the open-source sibling with much the same model and stronger alias management.

• Good for: permanent per-service addresses instead of throwaways.
• Watch out for: the initial setup, and features held behind the paid tiers.

9. Proton Mail

Proton Mail is the furthest thing from a throwaway on this list, and the right answer when the reason you wanted a temp address was privacy rather than disposability. It offers end-to-end encryption, custom domains, and around ten addresses, though multiple addresses require a paid plan.

• Good for: a durable private mailbox you actually own.
• Watch out for: the free plan's limits, which will not cover an alias strategy.

Guerrilla Mail alternatives compared

Guerrilla Mail retains mail for about an hour. Among the alternatives, YOPmail offers the longest no-signup window at roughly eight days, Burner Mail holds free-tier mail about seven days, and 10 Minute Mail and Temp Mail's free tier clear in about ten minutes. SimpleLogin and Proton Mail keep an address indefinitely. Every service below has a free tier.

Service	Free tier	Inbox retention	Standout feature
Guerrilla Mail	Yes	About 1 hour	150MB uploads, API
Temp Mail	Yes	About 10 minutes	Custom domains on paid
10 Minute Mail	Yes	10 minutes, extendable	Zero setup
YOPmail	Yes	About 8 days	Longest no-signup window
Maildrop	Yes	24 hours if unused	Built-in spam filtering
Mailinator	Yes	Varies by plan	API built for QA
mail.tm	Yes	Varies	Open source with API
Burner Mail	5 addresses	About 7 days	Browser extension
SimpleLogin	Limited	Indefinite with use	Revocable aliases
Proton Mail	Limited	Permanent	End-to-end encryption

How to create a temporary address in Gmail or Yahoo Mail

Gmail and Yahoo Mail both create throwaway-style addresses that feed your real mailbox. In Gmail, add a suffix using plus addressing, so mail sent to [email protected] arrives at [email protected]. Yahoo Mail instead creates a separate disposable address under your account, which you delete outright. Neither gmail.com nor yahoo.com appears on a disposable blocklist, so signup forms accept both.

In Gmail, use plus addressing: mail sent to [email protected] is delivered to [email protected], and you can filter or label on the suffix. To set it up:

• Pick a suffix per service, such as +shop or +newsletters.
• Enter the full address with the suffix on the signup form.
• Create a filter matching that address so the mail sorts itself.
• Delete or auto-archive the filter later instead of losing an inbox.

Yahoo Mail takes a different route, letting you create a separate disposable address under your account, which you delete outright when it starts attracting spam. The trade-off in both cases is that the mail is still tied to your identity, so this is spam control rather than anonymity.

What to do when a site blocks disposable email domains

When a site blocks disposable email domains, switch to a provider with several domains and try a less common one, use a Gmail or Yahoo alias, or use an alias forwarder on a custom domain. Sites maintain these blocklists to cut spam, fake registrations, abuse, and automated account creation, so the better known a temp provider is, the more often it gets refused.

Many sites check signups against databases of known disposable providers. Once a domain becomes popular, it lands on those lists, and every form using one of them rejects it.

That is why a well-known service can be the worst choice. Guerrilla Mail's age and reach are exactly what get it refused. If a form rejects your address:

• Switch to a provider with several domains and try a less common one, checked against the full list of tracked disposable providers.
• Use a Gmail or Yahoo alias instead, since neither domain appears on a disposable list.
• Use an alias forwarder, whose custom domains are not disposable domains at all.
• Check whether the mail was accepted but delayed before assuming a block.

If you are on the other side of the form, this is a filtering decision rather than a guessing game. A domain either appears on a disposable list or it does not, and a disposable email checker resolves it in one lookup. Verifiers flag these addresses with a disposable status of their own, separate from invalid, which lets you decide whether to reject the signup or accept it and suppress the address at send time.

The real limits of temporary email

Temporary email keeps spam off your primary address and hides your identity from a service you do not trust. It does not make you anonymous, it does not work on every site, and nothing is recoverable once the retention window closes. Never use a disposable address for banking, healthcare portals, government logins, or any account you may need to recover.

Temporary addresses do a narrow job well. They keep spam off your primary address, they reduce your exposure to phishing sent to an address you have already abandoned, they hide your real identity from a service you do not trust, and they delete themselves so there is nothing left to leak.

What they do not do is worth being clear about:

• Anyone who knows or guesses a public temp address can read the mail in it.
• Traceability depends entirely on the provider's own security posture, so anonymity is a claim, not a guarantee.
• Verification success varies by site and by the provider's domain reputation, so no service works everywhere.
• Recovery is impossible once the window closes, which makes temp mail unusable for anything you might need to log back into.

The line to hold is a usage line. Temp mail belongs on the newsletter, the download gate, and the forum you will visit once, and nowhere near an account whose password you may need to reset.

FAQs

What is the best Guerrilla Mail alternative?

It depends on the retention you need. YOPmail is the best no-signup alternative, holding mail about eight days. Temp Mail and 10 Minute Mail suit a single confirmation link. SimpleLogin and Addy.io are better when you want an address that survives indefinitely and can be revoked, and Proton Mail when the goal was privacy rather than disposability.

Are temporary email addresses safe and private?

They are safer than handing over your real address, and less private than they appear. Disposable addresses can be traced, and how well depends on the security measures the provider uses. On services with public inboxes, anyone who knows the address can read the messages.

How long do temporary emails last?

Anywhere from ten minutes to indefinitely. 10 Minute Mail and Temp Mail's free tier clear in about ten minutes, Maildrop holds unused inboxes 24 hours, Burner Mail keeps free-tier mail about seven days, YOPmail runs to roughly eight days, and alias services like SimpleLogin keep an address alive as long as you use it.

Is using a temporary email illegal?

No. Temporary email is legal, though it can be misused for activity that is not. Using a disposable address to avoid spam is ordinary, and using one to evade a ban or commit fraud is the part that creates a problem.

Can a temporary email receive phone verification codes?

No. Temp email services receive email, not SMS, so a code sent to a phone number will not reach them. Email-based one-time passwords usually do arrive, but success varies by site and by the provider's domain reputation.

Do temporary emails work on every website?

No. Sites that check signups against disposable blocklists will refuse the address, and the better known the provider, the more often that happens. Providers with multiple or less common domains get through more often, and a Gmail or Yahoo alias gets through nearly always.

BounceCheck is an email verification tool that flags disposable, invalid, and risky addresses before you send. If you run the other side of the signup form and disposable addresses are inflating your list, run it through BounceCheck before your next send. Verification will not repair a damaged sender reputation on its own, but it stops you from mailing addresses that no longer exist.