change maildomain on a kolab installation

[Antonio Straziota]

Hi all,
i want to modify maildomain of a kolab installation keeping my ldap structure.
I explain:
I've kolab installation with and a fileserver. These two servers are
integrated by samba.
My server fqdn is "kolab.demo.tst" and my mail domain is "demo.tst".
i need to change only maildomain to something like "everything.net". I
don't want to make new bootstrap because the samba integration
Is it possible?
If yes, Do you have an idea?

Thanks.