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 = if email.nil?
   8                            nil
   9                          else
  10                            email.split("@")
  11                          end
  12
  13     local_part.sub!(/\+.*$/, "")
  14
  15     local_part.delete!(".") if %w[gmail.com googlemail.com].include?(domain)
  16
  17     "#{local_part}@#{domain}"
  18   end
  19
  20   ##
  21   # get list of MX servers for a domains
  22   def domain_mx_servers(domain)
  23     Resolv::DNS.open do |dns|
  24       dns.getresources(domain, Resolv::DNS::Resource::IN::MX).collect { |mx| mx.exchange.to_s }
  25     end
  26   end
  27 end