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    +1 this comment if you have seen very similar behavior in Outlook+IMAP Commented May 3, 2022 at 19:53
  • I used to use IMAP in Outlook with no problems at all. First, you need to realize this is a legacy protocol. It should not be used anymore. Many mail systems are starting to shut this protocol down because it does not support modern authentication such as two-factor. Mail servers are also requiring you to reauthorize your client every so often to protect your account from compromise. Gmail is one of them, if it even supports IMAP anymore. Switch to a modern server/protocol that allows Outlook to function with all the power and versatility it actually has. Otherwise stick to your web client. Commented May 4, 2022 at 2:53