Zend_Mail_Protocol_Exception example

if ($port === null) {
            $port = $ssl === 'SSL' ? 993 : 143;
        }

        $errno  =  0;
        $errstr = '';
        $this->_socket = @fsockopen($host, $port, $errno, $errstr, self::TIMEOUT_CONNECTION);
        if (!$this->_socket) {
            /** * @see Zend_Mail_Protocol_Exception */
            throw new Zend_Mail_Protocol_Exception('cannot connect to host; error = ' . $errstr .
                                                   ' (errno = ' . $errno . ' )');
        }

        if (!$this->_assumedNextLine('* OK')) {
            /** * @see Zend_Mail_Protocol_Exception */
            throw new Zend_Mail_Protocol_Exception('host doesn\'t allow connection');
        }

        if ($ssl === 'TLS') {
            

if ($port === null) {
            $port = $ssl == 'SSL' ? 995 : 110;
        }

        $errno  =  0;
        $errstr = '';
        $this->_socket = @fsockopen($host, $port, $errno, $errstr, self::TIMEOUT_CONNECTION);
        if (!$this->_socket) {
            /** * @see Zend_Mail_Protocol_Exception */
            throw new Zend_Mail_Protocol_Exception('cannot connect to host; error = ' . $errstr .
                                                   ' (errno = ' . $errno . ' )');
        }

        $welcome = $this->readResponse();

        strtok($welcome, '<');
        $this->_timestamp = strtok('>');
        if (!strpos($this->_timestamp, '@')) {
            $this->_timestamp = null;
        } else {
            $this->_timestamp = '<' . $this->_timestamp . '>';
        }

$this->_transport = 'ssl';
                    $this->_secure = 'ssl';
                    if ($port == null) {
                        $port = 465;
                    }
                    break;

                default:
                    /** * @see Zend_Mail_Protocol_Exception */
                    throw new Zend_Mail_Protocol_Exception($config['ssl'] . ' is unsupported SSL type');
                    break;
            }
        }

        // If no port has been specified then check the master PHP ini file. Defaults to 25 if the ini setting is null.         if ($port == null) {
            if (($port = ini_get('smtp_port')) == '') {
                $port = 25;
            }
        }

        

    public function __construct($host = '127.0.0.1', $port = null)
    {
        $this->_validHost = new Zend_Validate();
        $this->_validHost->addValidator(new Zend_Validate_Hostname(Zend_Validate_Hostname::ALLOW_ALL));

        if (!$this->_validHost->isValid($host)) {
            /** * @see Zend_Mail_Protocol_Exception */
            throw new Zend_Mail_Protocol_Exception(join(', ', $this->_validHost->getMessages()));
        }

        $this->_host = $host;
        $this->_port = $port;
    }


    /** * Class destructor to cleanup open resources * * @return void */