Net::ESMTP::Session		T_PTROBJ
Net::ESMTP::Message		T_PTROBJ
Net::ESMTP::Recipient	T_PTROBJ
Net::ESMTP::EtrnNode		T_PTROBJ

Net::ESMTP::HeaderOption	T_IV

Net::ESMTP::Status		T_HVREF
Net::ESMTP::Auth		T_PTROBJ