Fatal error: Uncaught exception 'Zend_Mail_Protocol_Exception' with message '5.1.8 Sender address rejected ' in /library/Zend/Mail/Protocol/Abstract.php:431 Stack trace: #0 /library/Zend/Mail/Protocol/Smtp.php(261): Zend_Mail_Protocol_Abstract->_expect(250, 300) #1 /library/Zend/Mail/Transport/Smtp.php(207): Zend_Mail_Protocol_Smtp->mail('postman@360flow...') #2 /library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail() #3 /library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail)) #4 /application/modules/default/controllers/ErrorController.php(88): Zend_Mail->send(NULL) #5 /application/modules/default/controllers/ErrorController.php(92): Default_ErrorController->_sendErrorReport(Object(ArrayObject), 404, true) #6 /application/modules/default/controllers/ErrorController.php(29): Default_ErrorController->_sendErrorReport(Object(ArrayObject), 404) #7 /library/Zend/Controller/Action.php(516): Default_ErrorController->errorAction() #8 /library/Zend/Controller/Dispatcher/Stan in /library/Zend/Controller/Plugin/Broker.php on line 336