Not sure if you have already found a solution to this but I have found this solution.
Reload Failure Email Alerts can be set up using a configuration file written in xml and placed in a specific folder location on the Sense Server:
The file has to be called 'LocalLogConfig.xml' so that it can be recognised by Qlik and you must have an SMTP server that can be used. We have exchange at our organisation, however, common mail providers can be used such as Gmail.
The file also has to be written in a precise structure as attached. This can be adapted to suit your needs.