To my mind the easiest way would be not to re-invent the wheel and just leverage an existing email list verification service like https://neverbounce.com/
Validating 250,000 email addresses with that would cost you $100 -- Alan Bourke alanpbourke (at) fastmail (dot) fm _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://mail.leafe.com/mailman/listinfo/profox OT-free version of this list: http://mail.leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/1500279540.2945084.1043072656.48920...@webmail.messagingengine.com ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
