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when trying to open yahoo mail get 404 error URL not found on this serve why?

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I can open my yahoo account but when i try to open the mail account get the error message cannot find url on this server. If i go to the uk/irish yahoo can get mail there but the format is difficult to use. I do not use IE and rather not activate it.

I can open my yahoo account but when i try to open the mail account get the error message cannot find url on this server. If i go to the uk/irish yahoo can get mail there but the format is difficult to use. I do not use IE and rather not activate it.

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I have had this problem too...tried contacting Yahoo, they were not helpful. I can open it with IE, no problem. If I try opening with my favorites or Yahoo toolbar, it gives me the error message. If I disable the toolbar I can open thru my favorites. Uninstalling and re-installing Yahoo Toolbar did not fix the problem, so I am assuming at this point that the problem is between Firefox and the Yahoo toolbar, although I am not having any other problems with toolbar-linked sites.