If yahoo fails to communicate with remote server there can be internal issues with yahoo mail server. In such situations you might get a message to try after some time. Since yahoo has many servers menu will try after some time you will be able to use your yahoo mail account. When you get this type of issues you should not try to login again as this can prolong the waiting time. You have to wait for 15 minutes or so and again tried to login. Meanwhile engineers at yahoo will get to work and resolve the internal issues and yahoo mail account. Call the yahoo customer support team and resolve the problem easily.

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