I just saw the message that was attached in my last message to the list for
you.
It mentions my domain timescape.com and has DNS in front of it. as if it
tried a reverse DNS challenge and it failed.
This could be a problem on my domain's side.
I will look into it this morning and fix it if it is a bad certificiate or
something. But whatever it is, it is a brand new error. unfgortunately,
this one is on my side and will cost me money to fix. grump.
So, it may not be your fault.
/john
PS - Or yours DJX, I may need to attend to it on my mail server. which will
take me hours. It runs out every couple years or so, but it is really
supposed to be up to date.
Give me a couple hours.