Inbox is problematic ! From roundcube, I can send and receive 'to myself' without any problem. I can also send from roundcube to any E-mail and it works. However, if a send from, from instance, Thunderbird or any other E-mail, no message in the Inbox file ! A check with outlook office from the office platform ----e.g. portal.office.com website --- indicates that messages have been received in fact. So they should be in the Inbox of Rouncube. Any solution ?