Ping an email address to see if it exists. This script resolves MX records to find the SMTP server responsible for delivering mail to the address, connects to it, and starts to send a message to the address. It disconnects before the message is sent.

email-ping.rb

#!/usr/bin/env ruby
#
# = Email Ping
#
# Check to see if an email address exists by looking up MX records and connecting
# to the address's home SMTP server. It then starts to send a message to the address
# but quits before the message is actually sent.

require 'resolv'
require 'net/smtp'

address = ARGV[0].chomp
domain = address.split('@').last
dns = Resolv::DNS.new

puts "Resolving MX records for #{domain}..."
mx_records = dns.getresources domain, Resolv::DNS::Resource::IN::MX
mx_server  = mx_records.first.exchange.to_s
puts "Connecting to #{mx_server}..."

Net::SMTP.start mx_server, 25 do |smtp|
  smtp.helo "loldomain.com"
  smtp.mailfrom "test@loldomain.com"

  puts "Pinging #{address}..."

  puts "-" * 50

  begin
    smtp.rcptto address
    puts "Address probably exists."
  rescue Net::SMTPFatalError => err
    puts "Address probably doesn't exist."
  end
end

# vim: set ft=ruby ts=2 sw=2 :

Hi, sorry with this quistion, but do I use this file ?

Thanks :)

Hey @mikedamage nice code, but i was wondering, if you do this too much ( like 50.000 times a day ) the smtp servers could block you for some kind of spam?

Verify email with bulk check http://emailchecker.info/bulk-email-verifier.php

Cheapest bulk email verify at http://www.mycleanlist.com