everything else in the incoming mailbox, you could do something like
this:
-(setq nnimap-split-rule '((\"INBOX.gnus-imap\" \"From:.*gnus-imap\")
+\(setq nnimap-split-rule '((\"INBOX.gnus-imap\" \"From:.*gnus-imap\")
(\"INBOX.junk\" \"Subject:.*buy\")))
As you can see, `nnimap-split-rule' is a list of lists, where the first
even different split rules in different inboxes on the same server,
the syntax of this variable have been extended along the lines of:
-(setq nnimap-split-rule
+\(setq nnimap-split-rule
'((\"my1server\" (\".*\" ((\"ding\" \"ding@gnus.org\")
(\"junk\" \"From:.*Simon\")))
(\"my2server\" (\"INBOX\" nnimap-split-fancy))