# File lib/authlogic/regex.rb, line 13
    def self.email
      @email_regex ||= begin
        email_name_regex  = '[A-Z0-9_\.&%\+\-\']+'
        domain_head_regex = '(?:[A-Z0-9\-]+\.)+'
        domain_tld_regex  = '(?:[A-Z]{2,25})'
        /\A#{email_name_regex}@#{domain_head_regex}#{domain_tld_regex}\z/i
      end
    end