diff --git a/smtpd.go b/smtpd.go
index 3319baa..b6a07c7 100644
--- a/smtpd.go
+++ b/smtpd.go
@@ -1,4 +1,4 @@
-// Package smtpd implements an SMTP server with support for STARTTLS, authentication (PLAIN/LOGIN) and optional restrictions on the different stages of the SMTP session.
+// Package smtpd implements an SMTP server with support for STARTTLS, authentication (PLAIN/LOGIN), XCLIENT and optional restrictions on the different stages of the SMTP session.
 package smtpd
 
 import (