Quickstart with subdomain produces no configuration

If I attempt to configure mox (using an existing web server) with a subdomain that my mail server will be on, I get no output (swapped my actual domain for whatevermydomainis in this output):

./mox quickstart -existing-webserver -hostname mail.whatevermydomainis.com user@whatevermydomainis.com mox
Looking up IPs for hostname mail.whatevermydomainis.com...

WARNING: Quickstart assumed the hostname of this machine is mail.whatevermydomainis.com and generates a
config for that host, but could not retrieve that name from DNS:

    hostname not in dns, probably only in /etc/hosts

This likely means one of two things:

1. You don't have any DNS records for this machine at all. You should add them
   before continuing.
2. The hostname mentioned is not the correct host name of this machine. You will
   have to replace the hostname in the suggested DNS records and generated
   config/mox.conf file. Make sure your hostname resolves to your public IPs, and
   your public IPs resolve back (reverse) to your hostname.

Admin password: ABCDEFGHIJKL
generating static config: no elements

I have attempted to configure it without using the subdomain: ./mox quickstart -existing-webserver -hostname whatevermydomainis.com user@whatevermydomainis.com mox and that produces output that I can use but I am worried that it'll lead to garbage DMARC output since the hashes won't match.

My machine really is set to mail.whatevermydomainis.com if I query hostname.

Is there something I'm doing wrong? I am using 0.2.0. Thanks for the project BTW!

mjl- / mox

Quickstart with subdomain produces no configuration #19