【au Email App】Does it automatically delete old emails?
No, by default, old emails are not automatically deleted.
If the storage usage of the au Email App exceeds 2GB, you will be unable to send or receive emails, so please regularly delete unnecessary emails.
For your reference
Emails that have been received for more than 90 days will be automatically moved to the "#90 days old" [#90日以前のメール] folder, but they will not be deleted automatically. If you wish for emails to be automatically deleted, please set up the "Automatic Deletion Settings" [自動削除設定].
In the "Automatic Deletion Settings" [自動削除設定] , you can specify the number of days until emails moved to "#90 days old" [#90日以前のメール] folder are automatically moved to the "Trash" [ゴミ箱]. Emails moved to the "Trash" will be permanently deleted after 7 days.
Click here for the steps of "Automatic Deletion Settings" (in Japanese only)