This is the Postfix program at host mailhub.cosmos.it.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

			The Postfix program

<rtut-wqoy5YqoUEReoWH0uzbU5w@public.gmane.org>: data format error. Command output: rtut: Mailbox does not
    exist

<rufusnn-wqoy5YqoUEReoWH0uzbU5w@public.gmane.org>: data format error. Command output: rufusnn: Mailbox does
    not exist

<rufusn-wqoy5YqoUEReoWH0uzbU5w@public.gmane.org>: data format error. Command output: rufusn: Mailbox does not
    exist

<roysternn-wqoy5YqoUEReoWH0uzbU5w@public.gmane.org>: data format error. Command output: roysternn: Mailbox
    does not exist