bpo-38341: Add SMTPNotSupportedError in the exports of smtplib (GH-16525)


Add SMTPNotSupportedError in the exports of smtplib

Co-Authored-By: Brandt Bucher <brandtbucher@gmail.com>
(cherry picked from commit 3faf826e5879536d2272f1a51c58965a16827f81)

Co-authored-by: nde <denayer.norman@gmail.com>
diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index a634f7a..8e3d4bf 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -54,7 +54,7 @@
 import sys
 from email.base64mime import body_encode as encode_base64
 
-__all__ = ["SMTPException", "SMTPServerDisconnected", "SMTPResponseException",
+__all__ = ["SMTPException", "SMTPNotSupportedError", "SMTPServerDisconnected", "SMTPResponseException",
            "SMTPSenderRefused", "SMTPRecipientsRefused", "SMTPDataError",
            "SMTPConnectError", "SMTPHeloError", "SMTPAuthenticationError",
            "quoteaddr", "quotedata", "SMTP"]