What web browser are you using? (eg: Safari, FireFox, Internet Explorer)
What Operating System are you using? (eg: OS 9, OSX, Windows)
What type of email do you use? (eg: Hotmail, Yahoo, GMail)
Do you use your browser to check email, or an email client? (eg: Yes, or No. Do you use Outlook?)
Do you see any errors? (eg: 404! Page Not found. 500! Server Error. Wrong login/password)