public-inbox-mda: preserve SpamAssassin headers in spam

We want to be able to prioritize spam downstream to check for
borderline cases.

1 files changed, 8 insertions, 0 deletions

diff --git a/public-inbox-mda b/public-inbox-mda
index 522eeff7..047a4827 100755
--- a/public-inbox-mda
+++ b/public-inbox-mda
@@ -56,6 +56,14 @@ if (PublicInbox::MDA->precheck($filter, $dst->{address}) &&
                         $filter->pipe(PublicInbox::MDA->cmd, $main_repo);
                 }
         }
+} else {
+        # Ensure emergency spam gets spamassassin headers.
+        # This makes it easier to prioritize obvious spam from less obvious
+        if (defined($filtered) && length($filtered)) {
+                my $drop = Email::MIME->new(\$filtered);
+                $filtered = undef;
+                $filter->simple($drop);
+        }
 }
 exit 0; # goes to emergency