From be92aa505bc96bc83df5d64f8a2735cbd140d814 Mon Sep 17 00:00:00 2001
From: Joel Hillacre <joel@403forbidden.ca>
Date: Sun, 21 May 2017 14:01:04 -0600
Subject: [PATCH] bpo-30394: close socket, raise will provide no chance.
 RFC2821 S3.1 P3 server MUST wait for us to QUIT.

---
 Lib/smtplib.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index f7c2c77ab42075..5e422b704ad4dc 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -250,6 +250,7 @@ def __init__(self, host='', port=0, local_hostname=None,
         if host:
             (code, msg) = self.connect(host, port)
             if code != 220:
+                self.close()
                 raise SMTPConnectError(code, msg)
         if local_hostname is not None:
             self.local_hostname = local_hostname