Citadel questions and advice

I have been reading the Linode and Citadel docs, but have some questions regarding Citadel. I've never setup mail on Linux before (except through cpanel etc), so Citadel looks like a good choice for me as it sounds straightforward.

I don't need all the groupware stuff, but I do need to be able to setup and administer multiple mailboxes, aliases and forwarding etc for many different domains that I'm hosting on the same Linode. It can do this right?

Also, if I set it up at say citadel.example.com by editing "/etc/mailname" as per docs, can I later change the location to say citadel.another-domain.com without messing up the existing mail configuration?

Thanks in advance.