I have asked the following question elsewhere on StackExchange, and I was pointed here as the best place to ask the question.

The response said that I need to use doveadm which is what I expected. However, I cannot find examples of the correct search criteria. Can anyone help please?

I would have thought that this would be a FAQ but I haven't found a useful answer.

How do I expunge all email messages deleted using the email client regardless of which folder it's in?

2 Answers 2


As mentioned in the MS official article, the only way to delete all email in all folders is to right-click each folder in your folder list, select Delete All, and move the items to the Deleted Items folder.

References: Delete all email in all folders.

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  • Thank you for this, but my problem isn't in Outlook, it's on the server. When everything is deleted in Outlook, the IMAP server files do not shrink. I ned to force an expunge for all emails marked as deleted Nov 25 at 15:41
  • Deleting messages Deleted Items folder in Outlook can be synced to the server side. All you need to do is right-click the Deleted Items folder, and then click Empty Folder.
    – Christy
    Nov 28 at 6:37

It turned out that I didn't have to do anything. By the next morning, the mailbox had resized to empty. Presumably it's an async update on the part of the IMAP server

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  • Glad your issue has been resolved.
    – Christy
    Nov 30 at 9:08

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