The following was posted on the SpamSieve blog:

Version 2.9.27 of SpamSieve is now available. This is a free update that includes the following changes:


SpamSieve 2.9.27 works with Mac OS X 10.6 through macOS 10.12 and requires an e-mail client. Older versions are available for older operating systems. For information about previous releases of SpamSieve, please see the version history.