diff --git a/config.sample/plugins b/config.sample/plugins
index 0f96bfe..b3d35e2 100644
--- a/config.sample/plugins
+++ b/config.sample/plugins
@@ -47,6 +47,7 @@ auth/authdeny
 rcpt_ok
 
 check_basicheaders days 5 reject_type temp
+domainkeys
 
 # content filters
 virus/klez_filter