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mvrilo/gist:3722547

Created September 14, 2012 15:15
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gistfile1.rb
>> Resolv::DNS.new.getresources("gmail.com", Resolv::DNS::Resource::IN::MX).map { |dns| dns.exchange.to_s }
=> ["alt3.gmail-smtp-in.l.google.com", "alt4.gmail-smtp-in.l.google.com", "gmail-smtp-in.l.google.com", "alt1.gmail-smtp-in.l.google.com", "alt2.gmail-smtp-in.l.google.com"]
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