smtp.c: Fixed unnecessary state change if starttls fails

The state machine should only be changed to SMTP_STARTTLS when the
STARTTLS command has been successfully sent to the server.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/smtp.c b/lib/smtp.c
index 2433a6447..6204de0e8 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -543,7 +543,8 @@ static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
     /* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
        to TLS connection now */
     result = Curl_pp_sendf(&conn->proto.smtpc.pp, "STARTTLS");
-    state(conn, SMTP_STARTTLS);
+    if(!result)
+      state(conn, SMTP_STARTTLS);
   }
   else
     result = smtp_authenticate(conn);