[p1mrx]

These names are incompatible with the "host" command-line utility, probably because looking up the A record returns NXDOMAIN instead of NOERROR.

NXDOMAIN means "this name doesn't exist, so don't bother asking for other record types."

[Tho85]

Thanks for the feedback, I somehow missed that mistake. As a quick fix the server now returns NOERROR for both unknown records and names. That's still not 100% correct, but better than nothing.