I sent an announcement mail for Evolution 2.22. A sneak-peak of what we have done in 2.22
Spam Improvements
Bogofilter as default spam filter
White list support
Junk detection based on server side spam headers (Faster as messages won’t be download)
Junk/NotJunk flags stored on the IMAP Server (Second instance of Evolution detects spam automatically from stored headers)
UI Improvements
New [...]