Cyrus 3.2 with JMAP support is planned for March 2020. JMAP was presented at FOSDEM. Check out the video, and the slides with speakers' notes!
WikiSuite will add support for JMAP via a combination of contributions to Cyrus, Cypht integrated in Tiki Wiki CMS Groupware and the IETF standardization process. Please see: Cyrus IMAP 3 and JMAP development
- Cyrus IMAP 3 and JMAP development
- Next generation SIEVE standard: https://datatracker.ietf.org/wg/extra/about/
- Here is an example: https://ietf.topicbox.com/