Problem with email in O365

The O365 mail server is not sending and was not receiving mail for MU users until approximately 12.00.

25 Apr 2020 Libor Caha

According to O365 administrators, problems can be caused by sending spam from several compromised accounts. Mail delivery was resumed around noon, but colleagues from ICT are still working on sending and are solving the problem in cooperation with Microsoft. We will inform you about the changes. O365 mail was not functioning from Friday 22:30 to Saturday 17:30. Emails sent at this time need to be resent.

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