Thank you, that was swift. I can't send you the message from: postmaster@hotmail.com because I deleted, but it read like this:
Delivery to the following recipients failed:
guidorenzi@hotmail.com
By clicking on the email address (in the message itself) a compose window appears, where a fresh message could be sent, to exactly the same address I composed originally, which provoked again the Delivery Status Notification:Failure. The email address was already in the address bar.
Indeed, the recipient exists, and my subsequent messages were properly delivered.
The recipient maintains that he might have inadvertently deleted my message without reading it, but
I don't agree, because a message in the inbox is delivered, regardless of what the recipient will do with it.
Also, a spelling mistake did not occurr because a draft in my mail shows the correct address, and,
furthermore, the compose window included in the postmaster's message shows the correct
address of the recipient as in his businness card, and I re-sent the message using that window, with the same result.
Apple phone support rules out a block, and also mentions an invalid email, which is not the case.
You said that mailboxes can get full. I was not aware of that, but if that is the case, my question is
probably answered.
Thanks,
Dona
