Outlook 2000 and filtering email to other machines

I have 5 machines with windows 2000 on all and all with office 2000 on.

I have a domain and want everyones email to goto their outlook on their machine.

How would i go about this.
I'm not using server 2000 i don't actually have one as i don't need one.
Only one machine can dial up to the internet.
I'm not bothered where the mail is stored just so i can access the mail on each machine.

Any help would really help me
Thank you