How to verify an email address in Python

Verify whether an email address is real and deliverable — in real time, from Python, using the MailTester Ninja API. One HTTP call. Nothing is stored on our side.

Code

import requests

r = requests.get("https://happy.mailtester.ninja/ninja", params={
    "email": "someone@example.com",
    "key": "YOUR_API_KEY",
})
data = r.json()
print(data["code"], data["message"])  # -> ok Accepted

What you get back

`ok`	Accepted	the mailbox exists and accepts mail
`ko`	Rejected	invalid / undeliverable address
`mb`	Catch-All / uncertain	domain accepts everything, or temporary state

Get a free API key at mailtester.ninja/api. Prefer a quick manual check? Use the free domain analyzer.

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