Disable debug protocol logging

smtpd.go

@@ -109,7 +109,7 @@ func main() {
 		Hostname:         *hostname,
 		RecipientChecker: checkRecipient,
 		Handler:          handleMessage,
-		ProtocolLogger:   log.New(os.Stderr, "smtp: ", 0),
+		//ProtocolLogger:   log.New(os.Stderr, "smtp: ", 0),
 	}
 
 	if err := server.ListenAndServe(fmt.Sprintf(":%d", *port)); err != nil {