Network Ruby

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  4. To search for MX records you have to use the Resolv
require 'resolv'
Resolv::DNS.open do |dns|
  mail_servers = dns.getresources("google.com", Resolv::DNS::Resource::IN::MX)
  mail_servers.each do |server|
    puts "#{server.exchange.to_s} - #{server.preference}"
  end
end