The Cyrus Team have recently setup cyrus.works[1], a CI server for Cyrus IMAP. We have plans in to expand this in the New Year to cover more Cyrus options, more platforms and to test both 2.5 and 3.x.
You can find out more details in this FastMail Advent Calendar blog post[2].[3] As always, if you're interested in contributing towards Cyrus, our weekly meetings[4] will resume early next year. Chris Links: 1. https://cyrus.works/ 2. https://blog.fastmail.com/2016/12/14/cyrus-works/ 3. https://blog.fastmail.com/2016/12/14/cyrus-works/ 4. https://www.cyrusimap.org/dev/imap/support/feedback-meetings.html