Hi @情報システム ,
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③Backup Gmail mails using additional "POP3 recent mode" in Outlook + auto delete after 29 days from server feature. ※It successfully auto deleted mails from IMAP account for first 3 days, and stopped.
Do you mean that after three days, the messages were not deleted from the server, right?
If so, as i know, when you enable "Leave a copy of the message on the server" and set "auto delete after 29 days from server", emails received in your current Outlook client will be deleted after 29 days. I'm afraid that you didn't see that the emails have not been deleted from the server because they are not yet 29 days. It is recommended that you wait 29 days to check that everything is in order.
If you thing that it takes too long, you can also try to change the time kept on the server for a shorter time, and test on your Outlook to check if the messages will be deleted on the server on time.
Hope to help you!
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