--- /dev/null
+++ b/lib/PublicInbox/MailHeader.pm
@@ -0,0 +1,55 @@
-+# Copyright (C) 2020 all contributors <meta@public-inbox.org>
++# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+package PublicInbox::MailHeader;
+use strict;