lib/PublicInbox/NNTP.pm | 13 +++++++++++++

diff --git a/lib/PublicInbox/NNTP.pm b/lib/PublicInbox/NNTP.pm
index 939fc3a6b700bbbbaf6c4d2cd0744efe27dbfa2a..094d26dfea274e6edf30c124a802799164c341f9 100644
--- a/lib/PublicInbox/NNTP.pm
+++ b/lib/PublicInbox/NNTP.pm
@@ -653,6 +653,19 @@ 				} @OVERVIEW ));
 	});
 }
 
+sub cmd_xpath ($$) {
+	my ($self, $mid) = @_;
+	return r501 unless $mid =~ /\A<(.+)>\z/;
+	$mid = $1;
+	my @paths;
+	foreach my $ng (values %{$self->{nntpd}->{groups}}) {
+		my $n = $ng->mm->num_for($mid);
+		push @paths, "$ng->{name}/$n" if defined $n;
+	}
+	return '430 no such article on server' unless @paths;
+	'223 '.join(' ', @paths);
+}
+
 sub res ($$) {
 	my ($self, $line) = @_;
 	do_write($self, $line . "\r\n");