[johndoeee]

mail.h-email.net is a Spamhaus spamtrap.

As far as I've been able to research, these typesquatting domain traps started at the same time as Spamhaus CSS blacklist which was actually a company called Deteque.

If the MX has a large number of Hetzner IPs as mailservers, then it's probably Spamhaus.

[MrDOS]

Ah, neat – that certainly makes me feel a bit better, then.