# File lib/mail/network/delivery_methods/sendmail.rb, line 46 def deliver!(mail) envelope_from = mail.return_path || mail.sender || mail.from_addrs.first return_path = "-f " + '"' + envelope_from.escape_for_shell + '"' if envelope_from arguments = [settings[:arguments], return_path].compact.join(" ") self.class.call(settings[:location], arguments, mail.destinations.collect(&:escape_for_shell).join(" "), mail) end