lib/PublicInbox/Filter/Base.pm | 9 ++++++++-
 lib/PublicInbox/Filter/Vger.pm | 7 ++++++-

diff --git a/lib/PublicInbox/Filter/Base.pm b/lib/PublicInbox/Filter/Base.pm
index 0991e8748820e11b8a112728fbca2b6083c925c2..37f1ee7e59ea76d0211f82c42206a6268b792842 100644
--- a/lib/PublicInbox/Filter/Base.pm
+++ b/lib/PublicInbox/Filter/Base.pm
@@ -62,6 +62,13 @@ }
 
 sub err ($) { $_[0]->{err} }
 
+# by default, scrub is a no-op, see PublicInbox::Filter::Vger::scrub
+# for an example of the override
+sub scrub {
+	my ($self, $mime) = @_;
+	$self->ACCEPT($mime);
+}
+
 # for MDA
 sub delivery {
 	my ($self, $mime) = @_;
@@ -94,7 +101,7 @@ 	if (keys %sfx) {
 		push @r, 'Rejected suffixes(s): '.join(', ', sort keys %sfx);
 	}
 
-	@r ? $self->reject(join("\n", @r)) : $self->ACCEPT;
+	@r ? $self->reject(join("\n", @r)) : $self->scrub($mime);
 }
 
 1;
diff --git a/lib/PublicInbox/Filter/Vger.pm b/lib/PublicInbox/Filter/Vger.pm
index 9498081a1dc98617c5b7f0721d69a954f9ffc1aa..2ffed184a238e18624320b7d3fb3102bf98f4deb 100644
--- a/lib/PublicInbox/Filter/Vger.pm
+++ b/lib/PublicInbox/Filter/Vger.pm
@@ -17,7 +17,7 @@
 # only LKML had this, and LKML nowadays has no list trailer since Jan 2016
 my $l4 = qr!Please read the FAQ at +http://www\.tux\.org/lkml/!;
 
-sub delivery {
+sub scrub {
 	my ($self, $mime) = @_;
 	my $s = $mime->as_string;
 
@@ -28,6 +28,11 @@ 	if ($s =~ s/$l0\n$l1\n$l2\n$l3\n($l4\n)?\z//os) {
 		$mime = Email::MIME->new(\$s);
 	}
 	$self->ACCEPT($mime);
+}
+
+sub delivery {
+	my ($self, $mime) = @_;
+	$self->scrub($mime);
 }
 
 1;