This bug was extensively discussed yesterday: Microsoft Exchange stops passing mail due to bug on 1/1/22 (677 points / 355 comments) https://news.ycombinator.

This bug was extensively discussed yesterday: Microsoft Exchange stops passing mail due to bug on 1/1/22 (677 points / 355 comments) https://news.ycombinator.com/item?id=29756714 https://news.ycombinator.com/item?id=29756714