diff --git a/Source/domainset/reject.conf b/Source/domainset/reject.conf
index 66f066ef..89d95cc7 100644
--- a/Source/domainset/reject.conf
+++ b/Source/domainset/reject.conf
@@ -370,6 +370,12 @@ inst.360safe.com
 # Phishing Platform
 .forwardemail.net
 .spamscanner.net
+# Known Spammer
+# https://github.com/swc-project/swc/issues/11132
+# https://github.com/dprint/dprint/issues/1024
+# https://github.com/keycloak/keycloak/issues/43037
+.raptorengineering.com
+.rptsys.com
 
 .temp.swtest.ru
 .tw1.ru