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.
-- Best regards Vladislav Kurz