How to verify an email address in Ruby

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

Code

require "net/http"; require "json"

uri = URI("https://happy.mailtester.ninja/ninja")
uri.query = URI.encode_www_form(email: "someone@example.com", key: "YOUR_API_KEY")
data = JSON.parse(Net::HTTP.get(uri))
puts "#{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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