Yahoo! (!)

Wherefore art thou?

I've used Yahoo! Mail for years--ever since I figured out what e-mail was. Yahoo! is great: It's free, you can access it from anywhere, and when you change ISPs you don't have to e-mail everyone you know and tell them to change their address books.

Well, it USED to be great.

More and more, I'm unable to access my mail for varying periods of time.

NOTE: Yes, I DO pay for it--I pay ~$15/yr for some upgrades; most important among them is the privilege of sending e-mails free of annoying little ads at the bottom.