Speech of Oleksandr Simonov, Amoniac Founder, at Ruby Meditation 27, Dnipro, 19.05.2019 Next conference - http://www.rubymeditation.com/ Email validation techniques which help to optimize mailing. Basic algo. Own gem presentation. Announcements and conference materials https://www.fb.me/RubyMeditation News https://twitter.com/RubyMeditation Photos https://www.instagram.com/RubyMeditation The stream of Ruby conferences (not just ours) https://t.me/RubyMeditation