Who provides a good, user-friendly email service?

I’m currently using ATT-Yahoo (sbcglobal.net), and they’ve become a PITA.

Their server doesn’t allow users to stay logged in for more than 2 weeks, which wasn’t that big of a deal.
After that time, it logged me off, and that really offed me log!

But the last two times I tried to log back in, it wouldn’t let me. Instead, I had to call a tech to reset my password. Then I had to create a new one each time.

I told the above to both of the techs that reset my passwords, and still no resolution.

Do you know of a service that allows a user to stay logged in, for as long as the user wants to?