As a Proton Premium user with more than 5 domains using mx.proton and mx.simplelogin, I appreciate the new folder sharing feature in Proton Drive that allows others to upload files. However, I am facing a challenge as I cannot change the email address of the folder owner. This becomes less practical when I need to share with clients using an email address from a different domain. I hope Proton can consider providing users with the option to change the email address, given the interconnectedness of the Proton and SimpleLogin ecosystems.