--- src/smtp-gated.c	2010-06-17 11:21:25.000000000 +0200
+++ src/smtp-gated.c.dlucio	2011-03-22 04:28:44.000000000 +0100
@@ -1989,7 +1989,7 @@
 	}
 
 	// XCLIENT successful: forward XCLIENT-ack as MTA greeting to client
-	fdprintf(data->client, line);
+	fdprintf(data->client, "%s", line);
 	fdprintf(data->client, "\r\n");
 	return 0;