Tmailor Domains: 137 Temp Mail Domains on smtp.oneb.net

Updated 13 November 2026 · Volt Ghost team

The server at a glance

We read the MX record of every domain in our copy of the open-source disposable email domains list through Cloudflare's DNS-over-HTTPS service on 13 November 2026, then the TXT, DMARC, name server and apex records of the 137 members. The network comes from ARIN's registry and Team Cymru's IP-to-ASN service, the registration date from Verisign's RDAP service, and the list dates from the project's public Git history. The count was also 137 in our 10 November scan.

Why we call it the Tmailor pool

The list's history says so more clearly than for most pools. Four changes name the service outright: "from `tmailor com`" on 7 February 2025 (18 domains, all still on this server), "Add tmailor.com domains" on 16 November 2025 (66 of its 70 here), "Add Additional Verification Records for tmailor.com Domain" on 18 January 2026 (37 of 40) and "added tmailor domains" in June 2026 (1 of 3). That makes 122 of the 137. The other 15 came in general updates in June 2025 and January 2026.

The host name is the odd part. oneb.net is a 2006 domain whose own mail is handled by Google, yet its smtp host receives for 137 temp mail domains. The DNS doesn't say who runs it, and tmailor.com doesn't point at it. The link to Tmailor rests on what list contributors reported, which the shared server supports.

How the group grew

Tmailor's domains arrive in bursts, a few dozen at a time, and then the group stays still for months. Nothing joined or left it between our 10 and 13 November scans. The domains also hold on to their mail server. Of the 131 tmailor-named domains, only 9 are elsewhere today: 7 on Google's mail servers, 1 on Cloudflare Email Routing, and 1 that no longer resolves.

A receive-only setup

Every domain here has one MX record and nothing that would let it send mail. None publishes SPF, and only 2 publish DMARC. That is a different style from other temp mail pools. The domains on mail.tm's server carry DKIM keys and a strict DMARC reject policy. The Wabbly/Wally pool publishes an SPF record that authorises nobody (see mail.wabblywabble.com). Tmailor's domains simply leave sending undefined.

Two other details stand out. 134 of the 137 carry a Google site-verification record, which is normally added to prove ownership to a Google service; the record doesn't say which one. And 34 have a website on the apex while 103 have none, so "no website" is not a reliable sign on its own. As with any temp mail pool, the dependable signal is the MX host, which our MX lookup shows for one domain at a time.

If tmailor addresses show up in your sign-ups

Treat them as short-lived inboxes, not as proof of abuse; using temp mail is legal in most places, and our guide on how sites detect disposable email covers the fair options. The server also appears on our OVHcloud network page, next to YOPmail.

Look up a domain

Look up one name to see if it routes mail to smtp.oneb.net, who hosts its email, or what its MX records say.

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