Not synchroised messages

There are a lot of messages after ~Jan 2025 in the sent and drafts folder that don’t appear online in the same folder and trying to move these messages shows a message “not synchroised messages cannot be moved”
K9 version: 9.0
Connection: IMAP
Synchronisation: turned on
Folder mapping for drafts: automatic “drafts”
For sent: automatic “drafts”

Synchronisation and interaction with other folders like inbox works perfectly fine.

How can I…

  • Force sync these messages ?
  • Somehow get them either into another folder or download them in bulk etc?

Thanks!!!

Are the folders on each account within K9 mapped to folders on the server side?

Settings | Account | Folders

Then ensure Archive, Drafts, Sent, Spam and Trash are mapped to folders on the server side.

Yes, they are all mapped - see screenshot attached.

In the draft and sent folders, all new messages created with K9 won’t sync, all other messages for example in the inbox and spam can be received and can be moved to other folders etc.

I tried re-mapping the drafts folder to a different one and create a message to see if it gets synced - unfortunately no: visible in K9 not in the IMAP folder.

Additional info: I have another IMAP account with K9 - that one works perfectly fine, and is set up in the same way (different email provider though).