I'm using fastmail with INWX - but I don't know exactly why I'm struggling with DNS setup.
Option 1:
First I thought, that I use the Option to host my DNS with fastmail, and INWX is only the registrar. ("Configuring your domain with NS/MX").
But that doesn't work.
Option 2:
I have to write CNAME and TXT records inside the INWX Interface.
"Configuring your domain with MX only"
Why can't I choose Option 1? Did I choose the proper way?
And are these settings ok?
http://imgur.com/a/Z68Fm
EDIT:
ns1.messagingengine.com / ns2.messagingengine.com are the external Nameservers I setup with inwx