How can I use fetchmail with MSN?
You can’t. MSN uses something that looks like POP3, except the authentication part is nonstandard. And of course they don’t document it, so nobody but their Windows clients can speak it. This is a customer lock-in tactic; we recommend boycotting MSN as the only appropriate response. As of 5.0.8, we have support for the client side of NTLM authentication. It’s possible this may enable fetchmail to talk to MSN; if so, somebody should report it so this FAQ can be corrected.