-This may be set to C<spamc> to enable the use of SpamAssassin
-L<spamc(1)> for filtering spam before it is imported into git
-history. Other spam filtering backends may be supported in
-the future. This requires L<public-inbox-watch(1)>, but affects
-all configured public-inboxes in PI_CONFIG.
+A Maildir to watch for confirmed spam messages to appear in.
+Messages which appear in this folder with the (S)een Maildir flag
+will be hidden from all configured inboxes based on Message-ID
+and content matching.