Softminer.net

the main important NS record which shows where the hosting configurations is:

for example: www.test.com
ns1.domain.com
ns2.domain.com

then what you need to do is to add a new domain to your hosting plan:

when you add the domain to your host then the A record will automatically refer to web server:

for example web server is on x.x.x.x server then the A record will be on this IP.

the MX will also on the webserver configuration

Domain server---------------- Host --------------- Webhosting
www.test.com ---------------> domain.com
ns1.domain.com---------------> A --------------> x.x.x.x
ns2.domain.com --------------> Cname