+ if (tls == -1) {
+#ifdef TLS_SUPPORT
+ /*
+ * The user didn't specify any of the tls switches. Try to
+ * help them by implying -initialtls if they're using port 465
+ * (smtps, until IANA revoked that registration in 1998).
+ */
+ tls = ! strcmp (port, "465") || ! strcasecmp (port, "smtps")
+ ? 2
+ : 0;
+#else /* ! TLS_SUPPORT */
+ tls = 0;
+#endif /* ! TLS_SUPPORT */
+ }
+