While searching the web about a Nexpoint outage I came across this thread. I'm in the same boat as this morning my domain and email server that are hosted by Nexpoint went down. Thought it was a normal short term outage till I went to their web site to get their phone number only to find out their phone is also down. I've tried three different numbers and they are all disconnected.
Right now I am praying that this is a temporary issue as all my emails for the last 2 years are on their server.
FYI - no response to actual emails both to support and to billing (which I know worked as of last month because they processed my payment). No response to the tickets I opened on their own support website. And of course, no phones of any kind are working.