ispCP - Board - Support - VHCS fork

Hi, I like to ask you, if my ispCP running long time on name server - mydomainA.com and I need to change name server to mydomainB.com, how can I change this without reinstalation.
On ispCP running allready cca 20 webs and cca 50 emails, and I dont want to reinstall all webs on hosting.
I use many years nameserver mydomainA.com, now I needed for something else, so I registered mydomainB.com, and I dont know how to change it.
Thank you
Rossomak

I don't understand what you want. I think you have mixed up some terms. ispCP can not run on a nameserver. Do you mean a domain with nameserver? Do you want to change your ispCP-domain or do you want to change your hostname?

Im sorry,
I like to change my hostname of ispCP.

I use myhostname.com, when I use this adres for web, its ok, when I send email from admin@myhostname.com, its ok, but when I send mail to admin@myhostname.com , its not working
<admin@myhostname.com <mailto:admin@myhostname.com>>: unknown user: "admin"

Thats is one of reason why I like to change hostname.

Thank you

hostname != domainname.
Search the forum, there is already a thread about this issue.