I'm not getting any error messages from the test e-mails I sent out yesterday afternoon, so the server is accepting them.
Glad I'm not the only one. I thought maybe something had hijacked my e-mail
No e-mails since the 11th. Thought it might have been triggered by a new-to-me retailer's order confirmation. I've since found reports of problems with returns, but not with attacking e-mail clients!!