You sure already have that firstname.lastname@example.org Yahoo! email account, but that username is not really what you always wanted, because it was already taken when you signed up for your first Yahoo! account. You don’t want numbers like your birthday or combinations of your favorite numbers populating your email account either.
Now, this is your chance to grab that favorite username of yours. Yahoo! is offering two more domain names to associate with your user account, ymail and rocketmail. Same Yahoo! Mail technology, same inbox look, same storage space and spam protection. You can have that email@example.com and firstname.lastname@example.org, and transfer all your contacts from your previous Yahoo! account.