Burner domains

mail123box.tech is a disposable email domain

Our harvester first recorded mail123box.tech on 14 Oct 2026 and last recorded it on 17 Oct 2026. A temp-mail site offered it to visitors. An open list of disposable email domains carries it. We did not test delivery or count real signups.

What we have recorded

Listed by
  • the 7c/fakefilter open list
  • offered to visitors by the temp-mail site mail123.click
First seen by our harvester
14 Oct 2026
Last seen by our harvester
17 Oct 2026
Mail servers (MX)
No MX records found at our lookup on 14 Oct 2026.

Listed by mistake? Open an issue on GitHub with the domain and the real mailbox provider it belongs to.

What our checker answers

A signup with an address at mail123box.tech, checked on the email alone with today's data: block

  • disposable_domain: mail123box.tech is a known disposable email domain

signupbouncer runs this check on new signups to your app, through a Supabase auth hook or the REST API. Get a free API key or read the docs.

Check any email address

Paste an email address, and an IP if you have one. No account needed. The disposable email checker page explains each check.

We do not store the email or IP you type, and keep no history of your checks. The email's domain stays in our DNS cache for up to an hour, a hash of your own IP address is kept for up to 24 hours for rate limits, and we count how many checks end in allow, challenge or block each day. Details.