Gotmail fetches mail out of a Hotmail or MSN account, using the web interface as though through a browser. It works somewhat like fetchmail, and lets you do spiffy things like detecting and deleting spam (without even downloading the whole thing!) and forwarding mail, and storing it in a local mailbox.
Although the team behind Gotmail tries to keep it working, every few months Hotmail makes changes which break this until they have time to fix it. Have a backup plan for email access in case that happens.