So yesterday's glitch got corrected. Today's headache is a new one.
My old work e-mail address reflected the name of the former property owners. I created a new account this morning, with the new name in it. Then, of course, I sent a message to everyone in my address book to inform them.
The e-mail domain refused to deliver the messages, and accused me of being a spammer.
They all bounced back. Every. Single. Message.