I recently started using the credentials stored in SystemSettings for the IncomingEmail feature.
It works, but I am having issues with deleting emails from the server and no way to control the refresh timer.
This is how the settings look like inside the Config Tool: (old credentials are impossible to delete for some reason, they keep reappearing)

The "delete from server" setting here worked fine when I used "Using values below". How do I control this now that I am using SystemSettings?
Whenever I save the SystemSettings form, AwareIM pulls a ton of previously fetched emails. I assume this wouldn't happen if the delete from server was working correctly. I wan't AwareIM to check the mail box every minute, but it seems like it's using the default setting of 300 minutes.
By the way, I am using the testing environment. It worked fine when using "Using values below".