SUMMARY Mails moved into an IMAP folder don't show up in other clients and the web client. They only exist in the local storage and are essentially lost when setting up the IMAP-account on a different machine STEPS TO REPRODUCE 1. move email to different folder 2. synchronize 3. OBSERVED RESULT Mail available on local machine, can be read, interacted with, but not available in 3rd party clients EXPECTED RESULT mails synchronize with ease between different OS and clients, thanks to the magic of IMAP SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 5.4.0-66-generic (available in About System) KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 ADDITIONAL INFORMATION
After a few days the emails magically appeared in the webmailer and other email clients ...