# File lib/mail/network/delivery_methods/sendmail.rb, line 51
    def deliver!(mail)
      smtp_from, smtp_to, message = Mail::CheckDeliveryParams.check(mail)

      from = "-f #{self.class.shellquote(smtp_from)}"
      to = smtp_to.map { |to| self.class.shellquote(to) }.join(' ')

      arguments = "#{settings[:arguments]} #{from} --"
      self.class.call(settings[:location], arguments, to, message)
    end