--- 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;