+## DKIM headers list.
+## Surprise! Internal whitespace isn't allowed here.
+DEFCONF(dkim_headers,m4_dnl
+References:In-Reply-To:Subject:To:Date:Message-ID:m4_dnl
+From:Sender:Reply-To:Cc:m4_dnl
+Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:m4_dnl
+Resent-Message-ID:m4_dnl
+Content-Transfer-Encoding:Content-Type:MIME-Version:m4_dnl
+Content-ID:Content-Description:m4_dnl
+List-Id:List-Help:List-Unsubscribe:List-Subscribe:m4_dnl
+List-Post:List-Owner:List-Archive)
+