There is a need for a proxy service, and indeed, they do exist. Just not usable for most people.
Such a service enters a contract with the domain owner to forward (or scan and mail, or shred, or whatever) everything (or only non-spam) that is sent there.
The law is happy, because that is your address now, and failure to forward is something between you and the service you used; you bear all responsibility wrt the sender.
The author of a popular novel writing application offers that for his customers, as many write under a pen name and don‘t want their name to be publically known.
Other than that... nothing. You could employ a lawyer, but that would be expensive. You could get one of those „hire a post box“ services, but again, too expensive if not really used for business.
Some registrars offer that, but not for .de domains.
> You could get one of those „hire a post box“ services, but again, too expensive if not really used for business.
They're not too expensive, at least in the US. I an extra-small size PO box, and it costs the equivalent of $7 a month if rented yearly. Besides domain registrations, I've also used it as my mail forwarding address when moving, to help shake off junk-mail senders.
Such a service enters a contract with the domain owner to forward (or scan and mail, or shred, or whatever) everything (or only non-spam) that is sent there.
The law is happy, because that is your address now, and failure to forward is something between you and the service you used; you bear all responsibility wrt the sender.
The author of a popular novel writing application offers that for his customers, as many write under a pen name and don‘t want their name to be publically known.
Other than that... nothing. You could employ a lawyer, but that would be expensive. You could get one of those „hire a post box“ services, but again, too expensive if not really used for business.
Some registrars offer that, but not for .de domains.