There are two ways to unsubscribe from mail, and you only need to do one of them to be unsubscribed.
On rakuten-drive.com
1. Login to rakuten-drive.com
2. Click Profile image on the top right.
3. Click Account Settings.
4. In Notification settings, turn off the option to receive promotional emails from Rakuten Drive.
On an email from Rakuten Drive in your mailbox
1. Open your email from Rakuten Drive.
2. Scroll to the bottom of the email content and click Unsubscribe from this list.
3. Select a reason for unsubscribing, and then click Submit.
⚠ Please note that only promotional emails will be unsubscribed. You will continue to receive emails regarding important notices and service confirmations.