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| case sensitive When letters typed in uppercase are read differently than letters typed in lowercase. For example, your WebTV service e-mail address is not case sensitive. If your e-mail address is yourname@webtv.net, someone can send a message to YoUrNaMe@webtv.net, and it will still get to you.

Your WebTV service password is case sensitive. For example, if your password is Surfwatch, you must type it in exactly that way.