iPhone 上的邮件添加 Gmail 邮箱后显示很多个未读邮件的解决办法

To clear the “ghost” unread messages, do the following:

1. Open Settings
2. Select Mail, Contacts and Calendar
3. Select the mail account that is showing the incorrect unread messages icon
4. Change “Mail” setting from ON to OFF
5. Press the “Home” button (the round button just below the screen) to exit the Settings app
6. “Double-tap” the “Home” button to show running apps
7. Press and hold on any of the running apps. These will change and show a red circle with a “-” in the upper left corner of each.
8. Click on the red circle to close the Mail app (if you’ve never done this, closing all of these apps is a good battery life extender)
9. Press the Home button again to exit out of the open apps screen
   Open Settings
10. Select the mail account that is showing the incorrect unread messages icon
    Change “Mail” setting from OFFN to ON
11. Press the “Home” button to exit the Settings app
12. Open the Mail app
13. After the Mail app updates, your unread messages count should now be correct

参考链接

我做了以上操作后，还是会有900多份邮件，再做如下操作：

1. 打开【邮件】APP
2. 点击【所有收件箱】
3. 点击右上角的【编辑】
4. 点击左下角的【全部标记】
5. 点击【标记为已读】

这样基本就 OK 了，如果不行的话，大退 APP，然后重复全部标记为已读，或者稍等几十秒打开即可解决。