Best Free Temporary Email Services in 2025: Complete Ranking

What separates a good free temp-mail service from a bad one

Almost every service in this category is free, so "free" is not a differentiator. The things that actually vary are narrow and worth checking before you trust one with a signup:

• How long the inbox lives. Some expire on a fixed timer, some delete mail after an hour regardless of the address, some hold only a handful of messages.
• Whether you can send, or only receive. The overwhelming majority are receive-only. That is by design, because receive-only inboxes are harder to weaponize for spam, as 10 Minute Mail explains directly: "Most temporary email services, including 10 Minute Mail, are designed for receiving emails only ... This prevents abuse like spam campaigns."
• Ads and paywalls. A free tier often means an ad-supported tier, and several services gate their genuinely useful features (custom domains, API access, multiple inboxes) behind a paid plan.
• Whether there is a real API. If you are automating signups or testing email flows, a documented public API matters more than any UI polish.

We weight these over invented speed scores. You will not find a "9.6/10" rating here, because there is no way to measure another company's delivery latency from the outside.

The best free temporary email services in 2025

Ranked for general use, meaning protecting your real inbox on a throwaway signup. Each entry says what the service is good at and where it falls short.

TempMailSpot, for sending, exporting, and automating

This is our service, so weigh that accordingly. Its edge is a set of things most free peers do not do: it can send email (gated behind a CAPTCHA to keep it clean), and it exports messages to PDF, JSON, and EML so a receipt or confirmation code survives the inbox expiring. It opens instantly with no signup step, and the inbox refreshes on its own so new mail appears automatically within seconds (it polls every couple of seconds at first, then eases to roughly every twelve). The default expiry is ten minutes with unlimited manual extension, and there is a public REST API and an embeddable widget for programmatic use. It is free with no registration and no paywalled features, and the monetization is subordinate affiliate links rather than ads in the inbox.

Where it loses: it is a newer name than 10 Minute Mail or Guerrilla Mail, and it runs a focused domain set rather than dozens of rotating domains, so a site that blocklists it cannot be worked around by picking another domain.

10 Minute Mail, for the simplest possible signup

The original, and still the cleanest one-button experience. You get an address that, per its own site, "will expire after 10 minutes, after which you cannot access it." The timer is extendable in 10-minute increments if a verification email is slow. It is receive-only. There is no documented public API and no export. If all you want is to paste an address into a signup form and read one email, it is hard to beat.

Guerrilla Mail, for a long-lived address

Guerrilla Mail takes the opposite approach to expiry. Per its about page, "all addresses work all the time, they never expire," but "Guerrilla Mail deletes all email that was delivered to an inbox after 1 hour." So the address is permanent while the mail is ephemeral. It also has a public JSON API covering address creation, checking and fetching mail, deleting, and extending. Two caveats: there is no documented send_email API function (sending exists only in the web Compose UI), and at the time of writing that Compose page returned "Sending email has been suspended for today," so its send feature is throttled and unreliable. Treat Guerrilla Mail as receive-first.

Mail.tm, a free API with no key

If you are a developer, Mail.tm is the standout. Its API docs describe it as "completely free with no registration required" with no API key needed to start: "just call the endpoints. No signup, no tokens to start." It is receive-only, and the documented rate limit is "8 queries per second (QPS) per IP address," which is generous for most test harnesses. The trade-off is on the web side: the Mail.tm app is ad-supported and asks you to "disable ad blockers on our site."

Maildrop, a no-frills drop-in address

Maildrop is a clean, no-signup receive-only inbox built as a stand-in for your real address. Know its limits up front, documented in its developer docs: an inbox holds "a maximum of 10 messages" before the oldest are deleted, and "if a mailbox doesn't get a message within 24 hours, it erases all of its messages." Good for a quick signup, not for anything you need to keep.

Temp Mail (temp-mail.io): polished, but the useful parts are paid

Temp Mail has the most app-like free experience and native mobile apps, but its useful capabilities sit behind a paywall. Per its API page, "currently you can only receive messages, not send," and incoming mail self-destructs "within 1-2 hours." The free web app shows ads, and its subscription page lists "No ads," API access ("1,000 API requests/mo"), "10 Custom domains," "10 Emails at the same time," and "30 Days of message storage" as premium-only. Even custom domains require "a premium subscription."

EmailOnDeck: fine for a quick address, weak on free-tier sending

EmailOnDeck needs no registration, and an address, per its FAQ, "usually lasts most of the day" (sooner if you clear cookies). Its catch is sending: the same FAQ says you can send "only to other EmailOnDeck email addresses" on the free tier, and reaching any external address "you'll need to use EmailOnDeck Pro," a paid upgrade. There is no documented public API.

Side-by-side comparison

The columns that actually differ between free services. "Send" means sending to an arbitrary external address; "receive-only" services cannot do this at all.

Every cell reflects only what each provider documents on its own site or API docs; where a provider does not state something, we do not guess. This list is also intentionally short. We left out the long tail of clone sites that share infrastructure and copy, because their behavior could not be confirmed from a primary source.

How to pick the right one for your task

Match the tool to the job rather than chasing an overall score.

For a one-time signup or newsletter you will never read

Any receive-only option works. 10 Minute Mail and Maildrop are the lowest-friction. Just save anything important (a download link, a coupon, a confirmation code) before the inbox clears. Maildrop in particular keeps only 10 messages and wipes an idle inbox after a day.

When you need to reply, not just receive

Most services cannot help here. TempMailSpot can send (after a CAPTCHA), and Guerrilla Mail has a Compose feature when it is not suspended. EmailOnDeck free only sends to other EmailOnDeck users, which is rarely what you want. If two-way contact matters, test that the send actually goes through before you rely on it.

When you are automating or testing email flows

Go with a documented API. Mail.tm is free with no key and an 8 QPS limit; Guerrilla Mail offers a JSON API; TempMailSpot exposes a public REST API plus a widget. Temp Mail gates its API behind premium, and 10 Minute Mail and EmailOnDeck have no documented public API.

When you need a record afterward

Temp inboxes are designed to vanish. If you need proof of a transaction or a verification email kept, use a service that exports. Among free tools, that is where TempMailSpot's PDF/JSON/EML export helps; with the others, copy the content out manually before it expires.

Whatever you choose, treat a disposable address as disposable: do not point a bank, employer, or primary social account at it, and assume the provider can read mail that passes through. That trade-off is the whole point of the category, and it is covered in more depth in our guide to temporary email.