> > The foldernames vary and there haven't been any changes in these folders. > > The problem occurs on two iOS devices (iOS 8.1.2).
You could try to reset all imap folders or the device: sogo-tool manage-eas resetfolder <youruser> <folderid from listfolders> or sogo-tool manage-eas resetdevice <youruser> <deviceid> If the problem doesn't go away or if it returns a tcpdump could help to understand what's going on. -- [email protected] https://inverse.ca/sogo/lists
