How can I use 2 Servers with ispCP?

[joximu]

If I understand right:

server a) for domain yunio.de (mail and website)
server b) for domains like omann.yunio.de and maybe other domains (mail and web)

should be ok, just install (server b does not know of the domain on server a). for yunio.de you need to care about the DNS - but you should care about DNS anyway...

/J