Ehlers, Y.W. (Ydo):
There is no MX record, there is no A record, so mail can not be delivered. And Microsoft tops it off by explicitely claiming no e-mail will be send from this domain
for the record: one like to use RFC 7505 to express "this domain don't send / receive email"
adding an SPF -all is more one of many advises described in the fine MAAWG BCP:
https://www.m3aawg.org/sites/default/files/m3aawg_parked_domains_bp-2015-12.pdf Andreas
