メール　- メールアドレス持ち運びの公式メールアプリ is a free Android app developed by SoftBank Corp. It falls under the category of Social & Communication. This app allows SoftBank users to continue using their SoftBank email addresses even after canceling their SoftBank subscriptions. To avail this service, users need to apply through My SoftBank within 31 days of canceling their subscription.

The app supports S! Mail and E-mail (i), and provides push notifications for instant email alerts. Setting up the app is easy and convenient as users only need to enter their email address and password. It's important to note that Y!mobile's MMS and Y!mobile Mail require the use of the Y!mobile Mail app.

For more information about the service and detailed setup instructions, users can visit the official SoftBank website.