Microsoft MAPI Spooler in Ubuntu

[banGerprawN]

I've been using different flavours of Linux at home for ages now, but I've just thrown together a second work PC for numerous tasks, and I've decided to use Ubuntu on it. Now, with this PC, I want to be able to access the network's MAPI spooler that everyone uses, much as Outlook 2000/2003 does, except it's called "Microsoft Mail" and accesses a "postoffice".
I'm open to using pretty much any mail client, but KMail or Evolution is preferred.