TMailr
TMailr provides receive-only temporary inboxes, masked forwarding aliases, email deliverability tools, and a developer sandbox through web and API access.
What TMailr is
TMailr provides receive-only temporary inboxes, masked forwarding aliases, email deliverability tools, and a developer sandbox through web and API access. Temporary inboxes are accessed by private link, hold up to 50 messages on the free plan, and expire after a default 60 minutes, with extension up to 24 hours. Pro inboxes are described as effectively unlimited and remain available while subscribed. Masked aliases forward messages to a real mailbox, can be paused or blocked individually, and do not expose the forwarding address on TMailr pages or in API responses. For diagnosing email issues, it offers deliverability and Gmail inbox tests, domain checks for MX, SPF, DMARC, MTA-STS, and TLS, as well as a header analyzer, address checker, and DMARC builder. Developers can use test and live API keys, JavaScript SDK examples, polling, and signed webhooks for sandbox messages. TMailr also sanitizes incoming HTML, blocks remote images until requested, displays link destinations, scans attachments, and refuses executable file types. The service says stored data is encrypted, but messages are not end-to-end encrypted.
Good
- Free temporary inboxes with up to 50 messages
- Masked aliases can be paused or blocked individually
- Email deliverability and domain health tools
- API keys, SDK examples, polling, and signed webhooks
- Incoming HTML is sanitized and attachments are virus-scanned
Watch out
- Temporary inboxes are receive-only
- Free inboxes expire, with a 60-minute default
- Messages are not end-to-end encrypted
- No sending or replying from aliases
Who it suits
TMailr may suit people seeking temporary inboxes or masked forwarding, senders troubleshooting deliverability, and developers testing application email. Its maker advises against using disposable inboxes for genuinely sensitive information.
Verdict
TMailr combines short-lived inboxes and masked forwarding with diagnostic tools and developer testing options. Consider its expiration limits and the stated lack of end-to-end encryption before using it for any sensitive email.
Plans and prices
From TMailr's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | browser inboxes · masked aliases · 10 deliverability tests/month · free tools · forever |
| Pro | $2.99 a month | inboxes never expire while subscribed · effectively unlimited messages · 25 custom domains · monthly |
| API plan | $9 a month | 300 credits/month · higher API limits · purchased credits continue after allowance · monthly |
| Developer plan | $9 a month | 300 credits/month; higher API limits; bought credits carry on after the monthly allowance · $9 / month |
| Pay as you go | $10, paid once | 120 credits in starting pack · credits never expire · from $10 per credit pack |
| Pro | $24 a year | inboxes never expire while subscribed · effectively unlimited messages · 25 custom domains · annual; save a third |
The facts
Each one read from TMailr's own pages, with the date it was checked.
What it does
- Alias limitation
- Masked aliases receive and forward mail but TMailr does not send or reply on the user's behalf.checked 15 Oct 2026
- API
- The public API uses bearer keys and exposes sandbox creation and message retrieval under api.tmailr.io/v1.checked 15 Oct 2026
- API retention limits
- A sandbox stores 500 messages; listings return the newest 100 and support cursor pagination up to 200 per request.checked 15 Oct 2026
- Attachment protection
- Attachments are virus-scanned, clean files are downloaded rather than rendered, and executable formats are refused.checked 15 Oct 2026
- Content sanitization
- Incoming HTML is sanitized, scripts/forms/frames are removed, remote images are blocked by default and links show their actual destinations.checked 15 Oct 2026
- Custom domains
- Users can connect a domain by adding TXT and MX records; ownership is rechecked daily.checked 15 Oct 2026
- Deliverability test
- The deliverability test reports observed SPF, DKIM, DMARC, alignment, TLS and reverse-DNS details from a received message.checked 15 Oct 2026
- Deliverability tools
- The service offers deliverability tests, Gmail inbox tests, domain health checks for MX, SPF, DMARC, MTA-STS and TLS, plus a header analyzer, address checker, and DMARC builder.checked 8 Oct 2026
- Developer integrations
- Developers can use an API with test and live keys, JavaScript SDK examples, polling, and signed webhooks for captured sandbox messages.checked 8 Oct 2026
- Developer sandbox
- Sandboxes are catch-all test inboxes lasting one year and support plus-addresses for CI email testing.checked 15 Oct 2026
- Documentation
- TMailr links a full API reference at docs.tmailr.com, while the developer page provides curl examples and webhook verification code.checked 15 Oct 2026
- Domain health
- The domain checker examines MX, SPF, DMARC, MTA-STS and TLS-RPT records.checked 15 Oct 2026
- Email checker
- The address checker identifies syntax problems, disposable domains, role mailboxes and Gmail dot or plus aliases.checked 15 Oct 2026
- Email masking
- Masked aliases forward mail to a real mailbox, can be paused or blocked individually, and do not reveal the forwarding address on TMailr pages or API responses.checked 8 Oct 2026
- Gmail test
- A separate test sends mail to a real Gmail mailbox and reports whether Gmail placed it in inbox or spam plus Gmail's authentication verdicts.checked 15 Oct 2026
- Header analyzer
- The header analyzer traces each Received hop, timing, TLS use and recorded SPF, DKIM and DMARC results without storing pasted headers.checked 15 Oct 2026
- Inbox lifetime
- Free inboxes last 60 minutes by default and can be extended to 24 hours.checked 15 Oct 2026
The company
- Company description
- LinkedIn describes the maker simply as an information technology company.checked 15 Oct 2026
- Company followers
- The opened LinkedIn page displayed five followers for Bolrach Technologies Limited.checked 15 Oct 2026
- Company headquarters
- LinkedIn lists Bolrach Technologies Limited headquarters in Lagos, Lagos, Nigeria.checked 15 Oct 2026
- Company industry
- LinkedIn categorizes Bolrach Technologies Limited under Technology, Information and Media.checked 15 Oct 2026
- Company size
- LinkedIn lists the company size as 11–50 employees.checked 15 Oct 2026
- Company type
- LinkedIn identifies Bolrach Technologies Limited as privately held.checked 15 Oct 2026
- Company website
- LinkedIn lists bolrach.com as the maker's website.checked 15 Oct 2026
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