Core_Email::_smtp_connect

protected function _smtp_connect()
{
    $ssl = ($this->smtp_crypto === 'ssl') ? 'ssl://' : null;

    $this->_smtp_connect = fsockopen($ssl.$this->smtp_host,
                        $this->smtp_port,
                        $errno,
                        $errstr,
                        $this->smtp_timeout);

    if ( ! is_resource($this->_smtp_connect))
    {
        $this->_set_error_message('lang:email_smtp_error', $errno.' '.$errstr);
        return false;
    }

    $this->_set_error_message($this->_get_smtp_data());

    if ($this->smtp_crypto === 'tls')
    {
        $this->_send_command('hello');
        $this->_send_command('starttls');

        $crypto = stream_socket_enable_crypto($this->_smtp_connect, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);

        if ($crypto !== true)
        {
            $this->_set_error_message('lang:email_smtp_error', $this->_get_smtp_data());
            return false;
        }
    }

    return $this->_send_command('hello');
}