On Tue, 8 Sep 2020 09:57:59 +0800, hfh@cndns.com <hfh@cndns.com> stated:>Dovecot is on version 2.2.36. I tested it. Outlook on the Apple system>successfully logged in with the imap protocol, and then sent the LIST>command and outlook did not send any further. Dovecot returns the>results as follows:>>A003 OK LIST completed (0.001 + 0.000 secs).>>>There is no problem with version 2.1.17 using dovecot before. The>information returned by dovecot in version 2.1.17 is as follows:>>A003 OK LIST completed.>>>I suspect that the feedback of the following information causes>Outlook to not recognize it normally:>>(0.001 + 0.000 secs)What version of Outlook?--Jerry