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【au Email app】I would like to know how to deal when I get a "Reception Failure" [受信失敗] notification or when reception is delayed and I cannot receive in real-time

If you select "Do not allow" [許可しない] for background activities in the initial setup of the au Email app, the following issues may occur.

  1. You will be notified with "Reception Failure" [受信失敗] and cannot receive new emails
  2. Emails are not received in real time, but with a delay.

In that case, the issue can be solved by setting the au Email app to "Do not optimize battery" [電池を最適化しない] in the app's advanced settings.

Please see below for detailed steps.

Important note

  • This page uses images of Xperia 10 II SOV43. The steps are the same for other models, but the setting steps may differ depending on the model and OS.

Steps

  • 1

    Tap on "Settings" [設定] from the list of apps.

    • The way the app list is displayed differs depending on the manufacturer and device.
  • 2

    Tap on "Apps and Notifications" [アプリと通知].

  • 3

    Tap on "au Email" [auメール].

    • If you do not see au Email, tap on "Show all ●● apps" [●●個のアプリをすべて表示] and search for "au Email" [auメール].
  • 4

    Tap on "Advanced Settings" [詳細設定].

  • 5

    Tap on "Battery" [電池].

    • Depending on the model, it may be displayed as [バッテリー].
  • 6

    Tap on "Battery optimization" [電池の最適化].

    • Depending on the model, it may be displayed as "Power Saving Mode" [省電力機能].
  • 7

    Tap on "Non-optimized apps" [最適化していないアプリ] at the top of the screen.

  • 8

    Tap on "All Apps" [すべてのアプリ].

  • 9

    Tap on "au Email" [auメール].

  • 10

    Select "Do not optimize" [最適化しない] and tap on "Complete" [完了].

  • 11

    If "Non-optimized App" [最適化していないアプリ] is displayed under "au Email" [auメール] the process is complete.

    Please check if the issue of "Reception  Failure" [受信失敗] notifications in au Email has been solved.

For your reference

  • All of the indicated amounts exclude tax unless otherwise specified.