This release fixes a single regression introduced with v2.2.36.1. If using the obox plugin, the metacache process will not upload index changes in the background, which will cause excessive storage accesses when a user moves between Dovecot backends. Detailed information on the issue can be found in the Release Notes (see below).
The Release Notes contains the detailed changelog, along with upgrade instructions:
For details of how to install and update Dovecot Pro, please refer to the instructions at:
Best regards,
The Dovecot team