I’m having synchronization issues in imap.  I am accessing my mail from several different imap clients: K9 on Android, Windows 11 and 10 mail client, and Android Gmail app.  Both desktop and laptop, tablet, phone.  I know I have more than the usual number of imap connections...

Often when I delete a message in one place, it doesn’t get deleted in another.  For example, if I delete a message on K9 then open my laptop, it’s still there in W11 Mail.  But just now, I deleted some messages on my laptop and swiped down on K9 and the message disappeared on K9.  But K9 shows other messages which have been deleted in Windows 11 Mail.  I’ve not yet been able to figure out a pattern.  It’s annoying me.  I have to delete messages in several different places.  Messages not coming back, they’re just not being deleted in one place and that delete operation is not syncing to the others. 

Messages seem to be being marked as read properly across devices.  This seems to be an issue with delete only, so far as I’ve noticed.

I’ve long been using multiple imap clients, this syncing issue started maybe 6 to 8 months ago.

Is there a good way to get debugging info out of dovecot as to what the clients are doing? 

Or does anyone have any advise which might help resolve this without resorting to me digging into the imap protocol?

Michael Grant