> On 17. Jan 2022, at 10.54, Sami Ketola <[email protected]> wrote: > > > >> On 17. Jan 2022, at 10.31, Vladislav Kurz <[email protected] >> <mailto:[email protected]>> wrote: >> >> Dne 15. 01. 22 v 18:46 Panayiotis Fafakos napsal(a): >>> The same here in Greece. >>> The only Outlook version which respects open standards concerning the IMAP >>> protocol is Outlook 2010. >>> We thought at first that Outlook 2013 would also be compatible with >>> dovecot. Yet, as said, it seems to be a Microsoft company (internal) >>> policy, not to comply with standards, since this would bring their "tower >>> of cards" down. >>> We hoped that Outlook 2016 would make a difference, or at least Outlook >>> 2019, but none of the sort happened. >>> What is the exact problem? Well, here it is: >>> Many times, users create folders with non-compatible characters in their >>> folder names, either slashes or dots, etc. >>> Outlook accepts these characters as valid, while dovecot will not. Yet >>> Outlook creates the folder for the user and the user thinks he can use the >>> folder, although the folder does not exist on the server. >>> The user stores emails in the folder and uses it, until one day he either >>> logs in via his webmail and does not see the specified folder. He then does >>> not worry very much, since he can still work from his PC where Outlook is >>> installed. >>> Once the PC needs to have his hard disk replaced due to a failure, then >>> he/she discovers that his emails are lost forever. >> >> Thanks for sharing your experience. We had exactly the same problem with >> Cyrus IMAP. Good to know this is not Cyrus' fault. > > Please also note that atleast for M365 licensed version of Outlook for Mac > (version 16.57) now forces sync to microsoft cloud by default when adding > IMAP account: > > https://imgur.com/a/sB3Kfu6 <https://imgur.com/a/sB3Kfu6> > > (says in image: For better experience, your messages will be synced to the > Microsoft cloud) > > I cannot opt-out from this. (Just realised that this actually might be > something forced by my employers Intune policies)
And indeed after I continued to add the account the incoming IMAPS connection to my dovecot server came from 52.98.150.133 wwned by Microsoft. Sami
