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Question: My Apple mail account on my iMac fails to delete mail and update since installing High Sierra

My Apple mail account on my iMac fails to delete mail and update new mail since installing High Sierra

iMac, iOS 11.1

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Does the same problem occur if you restart your Mac in "Safe Mode"?: Use safe mode to isolate issues with your Mac - Apple Support.


Some additional troubleshooting steps to consider:


  • Rebuild that Mailbox, or all Mailboxes, according to the following: Rebuild mailboxes - Apple Support.
  • (Apple menu) > System Preferences... > Internet Accounts > select your email service, and de-select Mail. Wait a moment or two, then select it again.
  • If all else fails, temporarily remove that Account from that System Preferences pane, and then add it again.


The last two suggestions are described in greater detail here: Set up Mail with email accounts - Apple Support.


Create a backup if you haven't done that already. To learn how to use Time Machine please read How to use Time Machine to back up or restore your Mac - Apple Support. That doesn't have anything to do with your Mail difficulties; it just goes without saying that you should have a backup.


Also, if you are using any non-Apple "anti-virus", "cleaning", "washing" or similarly categorized junk on your Mac, don't. That also just goes without saying.

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Nov 13, 2017 4:33 AM in response to geoff_monaco In response to geoff_monaco

Does the same problem occur if you restart your Mac in "Safe Mode"?: Use safe mode to isolate issues with your Mac - Apple Support.


Some additional troubleshooting steps to consider:


  • Rebuild that Mailbox, or all Mailboxes, according to the following: Rebuild mailboxes - Apple Support.
  • (Apple menu) > System Preferences... > Internet Accounts > select your email service, and de-select Mail. Wait a moment or two, then select it again.
  • If all else fails, temporarily remove that Account from that System Preferences pane, and then add it again.


The last two suggestions are described in greater detail here: Set up Mail with email accounts - Apple Support.


Create a backup if you haven't done that already. To learn how to use Time Machine please read How to use Time Machine to back up or restore your Mac - Apple Support. That doesn't have anything to do with your Mail difficulties; it just goes without saying that you should have a backup.


Also, if you are using any non-Apple "anti-virus", "cleaning", "washing" or similarly categorized junk on your Mac, don't. That also just goes without saying.

Nov 13, 2017 4:33 AM

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User profile for user: geoff_monaco

Question: My Apple mail account on my iMac fails to delete mail and update since installing High Sierra