Dear Pattira Kunanopparat,
Thank you for being a loyal Yahoo! Mail user! We are excited to bring you the new Yahoo! Mail.
Starting the first week of June, you will be prompted to switch to the new Yahoo! Mail. The switch will be seamless and instantaneous--everything in your existing Yahoo! Mail account (emails, contacts, folders and attachments) will move over.
Don't want to wait? You can have the new Yahoo! Mail today.