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Try turning Off the Data connection, then restarting your phone, then when restarted, try turning On the WiFi connection only.
Then connect to the WiFi connection you have locally, or look for your SSID, and connect to it.
Sometimes having the Data connection turned On, interrupts the WiFi communication. Perhaps when it is WiFi On only, and once you are connected to the WiFi that way, you will be able to access your email that way.
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