a no-op once an SSL session is in progress. */
#ifdef SUPPORT_TLS
-#define mac_smtp_fflush() if (tls_active < 0) fflush(smtp_out);
+#define mac_smtp_fflush() if (tls_in.active < 0) fflush(smtp_out);
#else
#define mac_smtp_fflush() fflush(smtp_out);
#endif