[skdotdan]

I just tried to send an email to the "Registrant Mail" and...

* ATTENTION *

This email is being returned to you because the remote server would not or could not accept the message. The registeredsite servers are just reporting to you what happened and are not the source of the problem.

The address which was undeliverable is in the section labeled: "----- The following addresses had permanent fatal errors -----".

The reason your mail is being returned to you is in the section labeled: "----- Transcript of Session Follows -----".

This section describes the specific reason your e-mail could not be delivered.

Please direct further questions regarding this message to your e-mail administrator.

[geofft]

Registrants are required to have a working contact address and reply to, at least, communications from their own registrar in a timely fashion. They don't have to reply to everyone from the general public, but if you got a bounce, that's a good sign the email address is legit dead.

You can file a complaint at

https://forms.icann.org/en/resources/compliance/complaints/w...

and ICANN will follow up with the registrar, who will follow up with the registrant or cancel the registration. I'm pretty sure this is exactly the intended use: a domain squatter can't register a name and disappear completely.