You can reset it on your au Email Portability My Page.
For details, please refer to the information below.
Access My Page and log in with your au ID and password.
Launch the "au Email app" [auメールアプリ] → Tap on the "Menu icon (three lines)" [メニューアイコン (三本線のマーク) ] → Tap on "au Email Portability" [auメール持ち運び] → Proceed to Step 2.
Tap on "Email App Settings" [メールアプリの設定].
If you are using an iPhone, proceed to Step 3. If you are using Android or Gmail, please proceed to Step 4.
For iPhone / iPad
Tap on "iPhone Mail app" [iPhone 標準メールアプリ].
For further instructions, please refer to "STEP 3: How to set up the iPhone Mail app" on the following page.
For Android
Tap on "Android au Email app" [Android auメールアプリ].
For further instructions, please refer to "STEP 3: How to set up the au Email app" on the following page.
For Gmail
Tap on "Check the ID and password required for email settings" [メール設定に必要なID・パスワードを確認する].
For further instructions, please refer to "STEP 3: How to set up the Gmail app" on the following page.
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