tmailr
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Live — a real inbox, no signup

An address that vanishes.
Mail that lands.

Real inboxes you can use right now, masked addresses that guard your own, and proof your mail arrives.

Live

opening an inbox

you send we check it lands
Open full inboxTest deliverabilityGmail inbox testCheck a domain
Two receiving domains · codes pulled out for you · deletes itselfsystem status

Products

Everything here, free unless it costs us money

Hide My Email

A permanent address that forwards to your real mailbox. Give it to one shop; if it leaks, lock it or switch it off and keep your real address.

shop-receipts@isymail.comforwardinglocked to 1 sender
Create a mask

Deliverability Test

Send one message and see exactly what a receiver sees. Observed, never scored out of ten.

SPFDKIMDMARCTLS 1.3
Run a test

Gmail Inbox Test

Send to a real Gmail mailbox and see whether you land in the inbox or spam, plus Gmail’s own SPF, DKIM and DMARC verdict.

inboxSPFDKIMDMARC
Run a Gmail test

Domain Health

MX, SPF including the ten-lookup limit, DMARC, MTA-STS and TLS reporting for any domain, in plain English.

Check a domain

Test Inbox for CI

A catch-all sandbox your app can mail. Every plus-address works without creating anything first.

Open the sandbox

Your Own Domain

Point a domain you own at us and hand out addresses on it instead of ours. Ownership is re-checked daily.

Connect a domain
Header analyser, address checker, DMARC builderPaste raw headers and get the delivery path, authentication results and timing.Open

Proof, not promises

Reports read like this

Rendered from a real test of our own forwarding domain. Every check is what the receiving server observed, never a score out of ten.

This mail would land.

SPF passDKIM passDMARC passTLS 1.3
passSPFfwd.isymail.com allows the server that sent this
TXT · fwd.isymail.com
v=spf1 ip4:104.234.240.1 -all
passDKIMsigned, and the signature verifies
DKIM-Signature
v=1; a=rsa-sha256; d=fwd.isymail.com; s=mail;
  bh=gq0z…qBM=; b=Kb2P…Zw== verified
passDMARCaligned through both SPF and DKIM
Authentication-Results
dmarc=pass header.from=fwd.isymail.com
passTLSdelivered over TLS 1.3 with a valid certificate
Connection
tls=TLS1.3 cipher=TLS_AES_256_GCM_SHA384 iprev=pass

What we actually promise

Four commitments, each one checkable

  • 01Nobody can read your inbox by guessing itEvery inbox opens with a secret link, never with its address. Most disposable-mail sites let anyone type an address and read it.
  • 02We keep what we said we would keepMessages are deleted when the inbox expires, not "eventually". A sweep runs continuously and the health check fails if anything is overdue.
  • 03Your real address is never shownA masked alias never reveals where it forwards, not on any page and not in any API response, so the address alone tells a spammer nothing.
  • 04We tell you when something breaksIf mail stops flowing, the page you would open says so and says where the fix is: a bounced destination, a flood, or a domain that stopped verifying.

Writing

From the blog

All 32 articles
02 AugWhy your verification code did not arriveThe code comes from the service you are signing up with, not from us. That one fact explains most of the reasons it is late, and which of them you can do anything about.Guides02 AugWhy sites block disposable email, and where an alias differsThe "this email provider is not allowed" wall is a blocklist doing its job badly. Here is how a form decides your address is disposable, and the honest difference between a throwaway inbox and a masked alias.Privacy31 JulMost disposable email is not private at allOn many throwaway-mail sites, anyone who types your address can read your inbox. That is not a bug in those products, it is how they are built.Privacy

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