HostBill supports manual domain registration (via Email).
In order to activate the module login to your HostBill admin panel, go to Settings → Modules → Domain Modules, find and choose Email module and click Activate.
Once you activate the module you will be redirected to module configuration page. To configure the activated module you can also go to Settings -> Apps -> Add New App.
Fill in the configuration fields:
Then proceed to adding your nameservers:
Use Test Connection to check if HostBill can connect.
Click on Add New App.
Please see external article to learn how to configure TLDs and domain prices.
Please see external article to learn how to configure client domain management features.