app/controllers/concerns/email_methods.rb

   1 module EmailMethods
   2   extend ActiveSupport::Concern
   3
   4   private
   5
   6   def canonical_email(email)
   7     local_part, domain = email.split("@")
   8
   9     local_part.sub!(/\+.*$/, "")
  10
  11     local_part.delete!(".") if %w[gmail.com googlemail.com].include?(domain)
  12
  13     "#{local_part}@#{domain}"
  14   end
  15
  16   ##
  17   # get list of MX servers for a domains
  18   def domain_mx_servers(domain)
  19     Resolv::DNS.open do |dns|
  20       dns.getresources(domain, Resolv::DNS::Resource::IN::MX).collect { |mx| mx.exchange.to_s }
  21     end
  22   end
  23 end