Postfix multiple domains & mailboxes
 

hi,

I followed a tutorial at : howtoforge.com/perfect_setup_fedora_core_3

now i came stuck at some simple things...
how can i create users?
and the biggest problem of all, my server has 3 domains
(compnetix) .com .net .nl

i want the url of mail.(compnetix) .com .net .nl

and i need the same users but a different map and mail box..
i use pop3 mail connection... and it needs to be configured extern as well (the mail boxes example on Outlook Express at a windows computer out side of the network..)

how is this possable?
BTW: I'm a noob so explain in a easy way...

Thanks Already,
Fatum