/* When built with TLS support, the act of flushing SMTP output becomes
a no-op once an SSL session is in progress. */
-#ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
#define mac_smtp_fflush() if (tls_in.active.sock < 0) fflush(smtp_out);
#else
#define mac_smtp_fflush() fflush(smtp_out);