--- smtpclient_errno.c.orig	Wed Aug  1 15:09:39 2001
+++ smtpclient_errno.c	Wed Aug  1 15:11:36 2001
@@ -91,7 +91,7 @@ char *errorstr(int errnum)
 #else
 	static char buffer[50];
 	if (errnum < 0 || errnum >= sys_nerr)  {
-	    sprintf(buffer, "ERR-UNKNOWN (%d)", errnum);
+	    snprintf(buffer, (sizeof(buffer) - 1), "ERR-UNKNOWN (%d)", errnum);
 	    return(buffer);
 	}
 	return(sys_errlist[errnum]);