Recently I bought a new .WTF gTLD and thought it would be a simple matter of hosting it on my 1and1 hosting account.. gawd was I wrong..
1and1 do not support any new style domains on their accounts as an external domain. I presume it's a restriction on their proprietary software that they use instead of C-panel.
No word from 1and1 when their hosting will support the new domains of which they are quite happy to sell you after many customers asking via their own support forums for the past 9+ months
In the mean time the domain is hosted on an instance of Amazon Web Services (AWS) which I think might actually be faster than 1and1 and free for the first year if you have the knowledge to set one up)