Being new to Joomla the following took me some time to figure out:
This does not work for me:
$config = JFactory::getConfig();
$mf = $config->get('config.mailfrom');
The following does work:
$config = JFactory::getConfig();
$mf = $config->get('mailfrom');
Is this a configuration issue in my Joomla installation or should I update the Joomla documentation here?
Btw, I am using Joomla 3.3.