I just ordered at the weekend some S19 pro miners at miners.de for the batch in April. The support was not bad. They answer questions and call me back when it is not easy to explain in chat.

Strange is after I paid the money online yesterday. I wrote a mail to let them confirm, since part of the payment is over USDT. I have to let them know the money come from me. But my email from the address I registered was rejected! I got the message: "Your message wasn't delivered because the recipient's email provider rejected it." Change to another email addresse, the same mail go through without rejection.

Yesterday is Sunday and I wrote the mail just after the USTD transition, so I don't think someone do it intentionally. But why a registered email address got rejected?

I'll report what happens after there.