Welcome to Android Central! Are you using the stock Email app? Can you give us more details about how it isn't working? Does it crash? Does it just not sync?
How come my stock e-mail app don't work either on my Galaxy Tab 3 as well as my S3? I am having to use my G-mail app just to read my e-mails. Are there any known issues with stock e-mail app?
Welcome to Android Central! More details would help. What kind of email account is it? Did you have to enter the incoming and outgoing IMAP or POP3 server settings yourself? Are you sure Auto-Sync is on?