Hi everyone,
as everbody know one has two processes, one for resetting the password and one for sending the mail to confirm the contact.
And some others, but for me those two are most important:

The flows worked fine till yesterday around 8pm.
In the morning some testuser triggered the flows and no email is send.
The mailbox is active, flows are active, permissions are active and it worked like a charm till today morning.
Does anybody know a reason or what was changed today? We unfortunately changed nothing and were surprised to get the news today....
One thing what came to my mind is that I am using the new powerpage with the mspp prefix instead of the adx.
All the flows are set up with adx and there are no new flows created with mspp.

Any help is appreciated.