Emails sent by TUNI Moodle were delivered several hours late on Friday, September 4. There were two reasons for this: emails were queued on the email server used by the Moodle service provider, and there was a service disruption in Microsoft Exchange Online, affecting all incoming emails outside of your own organization.
If a similar disruption occurs again, you can find Moodle notifications in the Moodle user interface from the Notifications list (bell icon) in the upper right corner, or in the Moodle mobile app if you have installed it on your phone.