# VerifyGenius

> VerifyGenius tells you which of the contact data you already hold is safe to use, starting with email. It asks the company’s own mail server whether a business address is real, then hangs up. No email is ever sent, and only addresses we can prove are called safe to send. Operated by Rajoka Limited (UK company 12069067). Email first; phone numbers and postal addresses are planned. Early access only: no public sign-up or prices yet.

Key facts:
- A data sanitisation service: it checks contact data you already hold, without contacting anyone.
- Email checks talk to the company's own mail server (EHLO, MAIL FROM, RCPT TO, QUIT) and never send a message.
- Six results; only `valid` is safe to send, for 30 days: valid, invalid, catch_all, unknown, suppressed, bad_syntax.
- Catch-all servers are never reported as valid. Ambiguous answers stay `unknown`.
- Evidence (27-28 September 2026): 0 of 530 made-up addresses called valid; 0 of 152 answers changed on a repeat.
- Built and calibrated for UK business domains.

## Docs
- [Full page as text](https://verifygenius.com/llms-full.txt): everything on verifygenius.com, including the API reference
- [API reference](https://verifygenius.com/#api): endpoints, fields, errors, limits
- [OpenAPI description](https://verifygenius.com/openapi.json): machine-readable API v1 (base URL issued with an early-access key)

## For mail server administrators
- [What the checks are and how to stop them](https://verifygenius.com/#postmaster): the checker is api.verifygenius.com (169.58.33.41); opt out at https://insightbase.com/opt-out

## Optional
- [Early access](https://verifygenius.com/#access)
- [Privacy](https://verifygenius.com/#privacy)
- Contact: postmaster@verifygenius.com