My "MTHTrains.com" email service has rejected all incoming messages for four days now. This effectively puts me out of business.
Senders receive:
"This is the email server for the mthtrains.com domain.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
<zhyacht@mthtrains.com>: Permanent Failure: No account by that name here"
Anybody else using this service had this problem?