To set up an email on nook color, first open your email client program, select Tools then select Accounts and specify Your Email Account. Next, choose Properties and find the email account settings for your particular client. Change the POP server to pop.att.yahoo.com and the SMTP server to smtp.att.yahoo.com. Go ahead and select Advanced Tab, and then check the option labeled Use an encrypted connection (SSL) to change the SMTP port to 465. After this, check the option labeled Use an encrypted connection (SSL) and change the POP3 port to 995 then click OK.