First a brief note that Runbox 7 has to have the runbox.com cookie active between browser sessions in order for users settings to be saved. If you find that you settings are not being saved between browser sessions, ie after you have closed your browser and then openned it again it is almost certainly a cookie problem.
It’s easy to test. Open Runbox 7 webmail and make changes to the settings. Logout of Runbox 7, but do not close your browser. Now log back into Runbox 7 and check that you settings have been saved - they should have been. Now logout of Runbox 7 again and this time close your browser. Restart your browser and then login to Runbox 7. If you settings have no longer been saved then you have a cookie problem.
It is not my intention to solve peoples cookie problems. Some people have a natural aversion to cookies - I do, but I also know that some cookies are necessary. So if you have setup you browser to delete all cookies when the the browser closes, then you are going to have this problem.