why can't I set up my email address on my tablet

Had problems with my Samsung pro 4 tablet. Sent it back to manafacturers, they cleared everything on my tablet, the problems were, freezing, battery life very short,
very slow and flickering. But that was all sorted. So I have started again. Messenger set up, fine even putting in contacts was fine. But it just won't except my old email address.
did try putting a new one in plus new password but to no avail. It actually comes up with. Authentication failed. Set up could not finish

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