diff --git a/examples/dkim-proxy/main.go b/examples/dkim-proxy/main.go
index 64429b4..b9a8f45 100644
--- a/examples/dkim-proxy/main.go
+++ b/examples/dkim-proxy/main.go
@@ -1,3 +1,4 @@
+// Command dkim-proxy implements a simple SMTP proxy that DKIM signs incoming e-mail and relays to another SMTP server for delivery
 package main
 
 import (