If your service is canceled, you will be able to reactivate it within 30 days of the cancellation date. If you reactivate your account within these 30 days, you will regain access to your account, with a new billing date. However, any email messages previously stored in mailboxes associated with your account will not be recoverable, and your files may no longer be available.
AT&T Yahoo! customers:
You can no longer reactivate a canceled plan using the steps below. For help recovering your domain, please contact customer care.
To reactivate your service:
Your service will be reactivated, and you will be able to use its features immediately.
Tip: If your domain registration also expired, you may need to contact customer care. See more on expired domains.