It's quite entertaining to read - most of the article is pretty much elaborating a chain of bad decisions by the author which all lead to this now being a big problem. If he'd have written a similar dependency tree earlier and just thought about it for a few minutes that should've been avoidable.
> Update 1 - I know I can simply change the MX record to someone else but It has its own challenges.
I don't quite get that attitude. He's describing that he needs his business emails. Not just getting a mail server back online for that, even as interim solution, points to the opposite. In the time it takes for MX TTL to expire he could easily just throw up a postfix+dovecot on some VPS, with enough time to spare to add something like sogo if he feels fancy.
> Update 1 - I know I can simply change the MX record to someone else but It has its own challenges.
I don't quite get that attitude. He's describing that he needs his business emails. Not just getting a mail server back online for that, even as interim solution, points to the opposite. In the time it takes for MX TTL to expire he could easily just throw up a postfix+dovecot on some VPS, with enough time to spare to add something like sogo if he feels fancy.