You know Jaime I have no idea!
I haven't looked too much into this, but what are rough costs for hosting, say 10 boxes? And where would I host them.
This may seem like I don't know much about setting up internet stuff but to be honest I never do that sort of thing at work, and have never thought about it until very recently.
But I know enough to know I need to ask
Who hosts your domainnames Martin?
You may find they will do it all for you......
I have a couple of domainnames and I use a company called Virtual Names for hosting them........they're pretty cheap.....I think £8/2years for domainname registration and then I have mail forwarding for £5/year.
They have a control panel you can log into a setup basically anything you want.....
ie you could have say
everyone@yourdomainname.com being forwarded to your isp's mailbox (catch all and redirect)
or
Martin@yourdomainname.com -> your isp's mailbox
Sue@yourdomainname.com -> your isp's mailbox
Then with your mail client you could filter for Martin or Sue and redirect to different mail folders.
You can also set different names (before the @ ) to be sent to different isp's mailboxes.
You may find who you use to host the domainnames has a similar setup :-/