# File lib/mail/configuration.rb, line 28
    def lookup_delivery_method(method)
      case method
      when nil
        Mail::SMTP
      when :smtp
        Mail::SMTP
      when :sendmail
        Mail::Sendmail
      when :exim
        Mail::Exim
      when :file
        Mail::FileDelivery
      when :smtp_connection
        Mail::SMTPConnection
      when :test
        Mail::TestMailer
      else
        method
      end
    end