We are migrating to a new machine - from our beloved Raspberry Pi 4 to a full-fledged virtual machine!
For the migration the site will go off-line today Sunday 15 October 20:00 until late evening.
Typically after a migration the email notifications, whether messages, notification from assignments, copies of forum posts and password resets, get disturbed. It comes mostly from the recipients' mail provider side; they detect the change and often quarantine the mail as spam.
So if you currently attend an active course, please keep on checking its announcements forum until you are certain that the mails arrive.