尽管下面的解决方案仅使用Python Win32扩展（Python Win32扩展附带的sspi示例代码非常有帮助），但问题中提到的python-ntlm IMAP和SMTP修补程序也可作为有用的指南。
from smtplib import SMTPException, SMTPAuthenticationError
import string
import base64
import sspi
# NTLM Guide -- http://curl.haxx.se/rfc/ntlm.html
SMTP_EHLO_OKAY = 250
SMTP_AUTH_CHALLENGE = 334
SMTP_AUTH_OKAY = 235
def asbase64(msg):
# encoding the message then convert to string
return base64.b64encode(msg).decode("utf-8")
def connect_to_exchange_as_current_user(smtp):
"""Example:
>>> import smtplib
>>> smtp = smtplib.SMTP("my.smtp.server")
>>> connect_to_exchange_as_current_user(smtp)
"""
# Send the SMTP EHLO command
code, response = smtp.ehlo()
if code != SMTP_EHLO_OKAY:
raise SMTPException("Server did not respond as expected to EHLO command")
sspiclient = sspi.ClientAuth('NTLM')
# Generate the NTLM Type 1 message
sec_buffer=None
err, sec_buffer = sspiclient.authorize(sec_buffer)
ntlm_message = asbase64(sec_buffer[0].Buffer)
# Send the NTLM Type 1 message -- Authentication Request
code, response = smtp.docmd("AUTH", "NTLM " + ntlm_message)
# Verify the NTLM Type 2 response -- Challenge Message
if code != SMTP_AUTH_CHALLENGE:
raise SMTPException("Server did not respond as expected to NTLM negotiate message")
# Generate the NTLM Type 3 message
err, sec_buffer = sspiclient.authorize(base64.decodebytes(response))
ntlm_message = asbase64(sec_buffer[0].Buffer)
# Send the NTLM Type 3 message -- Response Message
code, response = smtp.docmd(ntlm_message)
if code != SMTP_AUTH_OKAY:
raise SMTPAuthenticationError(code, response)
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