Service appears to have stopped working today at around 11/01/23 04:45 GMT - all my devices are unable to send messages.
Just confirm everything is working as expected and no failure has been reported.
We are handling this directly at firstname.lastname@example.org (we have just replied about this)
I have had over two hundred devices connected for many months which have all stopped sending via MyQttHub - a similar number sending via another service are all working OK.
There does appear to be a problem.
Just to confirm that the issue is now resolved. The public IP address of our 4g SIM network (1nce) had been blocked by MyQttHub - once unblocked the devices were able to communicate again.