Can I customize my mail stuff?

I would like to know if I can customize the server/account of my email stuff,so that it is that way I put it up ,for all users?

if it is changeable,where do i find it,and where do I start.

thank you very much

Not sure exactly what your asking. You can create new email addresses, have them forward, change the size of their inbox, choose how the message are archived, use POP or IMAP…

You make changes in the web panel.