Main domain

The canonical domain for you application, ie www.natcheurope.com or login.natcheurope.com

Use a single C-name to point to the hostname you received from Natch, ie lb00.natchcloud.com. Make sure you don't have a duplicate entry as an A-record.

cname   my combell

Naked domain

A naked domain is one without www, ie natcheurope.com.

Registrar support webforwarding?

Configure the webforward to redirect to your www-domain.

web forwarding   my combell

Registrar does not support webforwarding?

Consider moving to a registrar that supports webforwarding, like Combell.

Point your naked domain to 174.129.25.170 using an A-record. This is a free server by wwwizer that forwards the naked domain to the www-domain.