Welcome to Android Central! First, can you tell us the exact model name/number of the tablet, or is it just Bright Tab?
Second, you're certain you're connected to the web via wi-fi, right? Can you access other things over the web, like use the browser?
Third, how are you trying to access the email feature? Are you talking about the Email app that came with the device? Have you added your existing email account to it? Or are you using Gmail?