--- smtplib.py.wcf	2007-10-30 10:39:44.000000000 -0700
+++ smtplib.py	2007-10-30 10:52:15.000000000 -0700
@@ -625,6 +625,14 @@
             sslobj = socket.ssl(self.sock, keyfile, certfile)
             self.sock = SSLFakeSocket(self.sock, sslobj)
             self.file = SSLFakeFile(sslobj)
+            # RFC 3207:
+            # The client MUST discard any knowledge obtained from
+            # the server, such as the list of SMTP service extensions,
+            # which was not obtained from the TLS negotiation itself.
+            self.helo_resp = None
+            self.ehlo_resp = None
+            self.esmtp_features = {}
+            self.does_esmtp = 0
         return (resp, reply)
 
     def sendmail(self, from_addr, to_addrs, msg, mail_options=[],