I use Evolution as my mail client. I receive Gentoo mailing list email
at my GMail address, and access this email in Evolution over IMAP.
I want Gentoo mailing list messages to go into a Gentoo mailing list
folder in Evolution, and so I've setup an incoming mail filter to take
all mail with a sender or recipient address matching '@lists.gentoo.org'
and move it to my Gentoo mailing list folder.
Despite ticking the 'Apply filters to new messages in INBOX on this
server' check-box in the Evolution Account Editor, I have to highlight
new email and click 'Apply Filters' in Evolution's 'Message' menu so
that Evolution will actually move them to the desired folder.