Between 17 and 20 July 2025, there were disruptions to the student mailboxes, which resulted in mailboxes being deleted. These were restored from the backups. In this context, the following symptoms may also occur or have occurred after the restoration:

Emails are missing:

• In this case, we have sent you an email with a list of the affected sender addresses once your mailbox has been restored.
  If necessary, you can write to the senders with this information and ask for a resend.
• Note: In some cases, the list of sender addresses may also contain older receipt data (date/time information prior to the disruption). However, the corresponding e-mails were not deleted as a result of the fault, but beforehand and were accidentally added to the list.
• Emails from TUCaN and Moodle: The original messages for e-mail notifications from these systems can still be found in the systems (TUCaN: message overview; Moodle: message window). In the list of sender addresses sent, you can recognise these messages by the address components noreply@tucan… and moodle@… .

All folders are missing:

• This problem should no longer occur.
• If you are still experiencing this problem, close the app/email programme completely and restart it. Then wait a while so that synchronisation with the server can take place. This may take several minutes. If this does not help, please contact HRZ Service.

Duplicate emails:

• Occasionally, emails may be duplicated after the restore process. In this case, you can delete one of the emails.

We very much regret this inconvenience and apologise for it.