add info about spamhaus

diff --git a/dnslists.otl b/dnslists.otl
index 571f5ab8a46c2af3b7eb2b596f6213ecc3d39356..6591072d6467e4de8ddd84554994d7c01f107892 100644 (file)
--- a/dnslists.otl
+++ b/dnslists.otl
@@ -482,6 +482,8 @@ TODO
                        https://www.spamhaus.org/organization/dnsblusage/
                listing policies are clearly documented
                return codes are clearly documented
+               history of grandeur and retaliation listings
+                       https://www.heise.de/hintergrund/Spam-Golem-291396.html
        http://www.surbl.org/
                good reputation
                lists domains/URIs