Beware, picking up emails via a dialup while abroad can cost you a small fortune! I suggest you sign up with an ISP that has lots of local dialup numbers - I've used AT&T in the past, you could also try AOL. Alternatively, you could find out if there's a good local ISP in the places you go to the most: I had a spate of going to Thailand and ended up spending a few quid on a Thai dialup that had loads of local numbers and cost me buttons to dial from hotel rooms.
Hotel phones are notoriously disgustingly expensive - you should try and avoid dialing anything other than a local number from a hotel room anywhere in the world. To be honest, these days I'd rather nip into an internet cafe and pick up my email that way rather than lugging a precious laptop and running up extortionate phone bills.