I've configured Mail.app, to use a IMAP server (dovecot). I'm connecting to this IMAP server through several devices. However whenever I read a mail from another comps than my Mac, unless I click Synchronize 'account', the mails I've read on other devices, and who have been found by Mail.app, before I read them, stay in the unread state.

From the Gmail web client, click Settings from the cog menu. Outlook for mac 2016 open shared calendar. In the Forwarding and POP/IMAP tab, click Enable IMAP. Click Save Changes. If a user sets permission levels only to allow free/busy or free/busy limited details, an Outlook 2011 user will not be able to see any details of the shared calendar. PC users must grant 'full details' to the Outlook 2011 user. Mac users must grant the 'Reviewer' role to Outlook 2011 users.

Is there a way to get a real synchronization of the mails status (it's supposed to be a benefit of IMAP)? P.S: when going into a folder, then the unread count is updated. But I have to manually go to that folder to have the correct unread count.