public-inbox-learn | 1 +

diff --git a/public-inbox-learn b/public-inbox-learn
index bb130b215fc686ac82b37ec4351460251e7ef167..13b75b763cfc9d3280011b29a237065d013de987 100755
--- a/public-inbox-learn
+++ b/public-inbox-learn
@@ -56,6 +56,7 @@
 		# no checking for errors here, we assume the message has
 		# been reviewed by a human at this point:
 		PublicInbox::Filter->run($mime);
+		PublicInbox::MDA->set_list_headers($mime, $dst);
 
 		my ($name, $email, $date) =
 				PublicInbox::MDA->author_info($mime);