Suddenly all my Messerger/Skype services stopped working on my family domain "penttinen.im". This includes chatting on PC, Messaging on our Lumia phones, Skype and the Rooms feature on the Lumias.

Nothing has changed on the domain settings side, I just double checked that. Email services luckily work ok. This is a pretty serious fault, as I have the whole family depending on this Live Domain.