Also wanted to throw this out there, ISP mail is good, except for when you move or change service providers. Then you have to change email addresses, change logins for websites, update all sorts of information, let everyone know your new email address, etc.
It's a big pain in the rear (I had to do it twice in a year, no fun). If possible, use one of the free web-based email services for your primary email, or at least for websites that you subscribe to.
You don't have to worry about losing emails if your hard drive fails or laptop is stolen, etc.
With Gmail (sorry Dch, it's a great service) you get a ton of space, so you don't have to worry about getting too much mail and deleting the old stuff if you choose not to. Secure IMAP (for free, by the way, Yahoo charges for this) keeps your emails synched almost as well as MS Exchange does on multiple devices, and it's secure unlike POP3.