Loftux,
Some remarks:
- mail.smtp.auth is the variable used by subetha mail program, just keep that in it.
- mail.smpts.auth is the secure smtp variant and concerns another item (relevant for gmail, for example)
- the subsystem email is not loading custom properties files…..indeed
So, my advice: do not change the context xml file (no need to).
However….you are still partly right, in the sense that the mail.smtp.auth is not used properly (it is indifferent between false/true). There is a bug, I presume.
Alfresco engineers, be more specific about the possibilities to create a subsytem override in "classes/alfresco/extension/subsystems" and make sure that this override is picked up!
Kind regards….