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, SMTPAuthenticationErrorimport stringimport base64import sspi# NTLM Guide -- http://curl.haxx.se/rfc/ntlm.htmlSMTP_EHLO_OKAY = 250SMTP_AUTH_CHALLENGE = 334SMTP_AUTH_OKAY = 235def asbase64(msg): # encoding the message then convert to string return base64.b64enpre(msg).depre("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 pre, response = smtp.ehlo() if pre != 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 pre, response = smtp.docmd("AUTH", "NTLM " + ntlm_message) # Verify the NTLM Type 2 response -- Challenge Message if pre != 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.deprebytes(response)) ntlm_message = asbase64(sec_buffer[0].Buffer) # Send the NTLM Type 3 message -- Response Message pre, response = smtp.docmd(ntlm_message) if pre != SMTP_AUTH_OKAY: raise SMTPAuthenticationError(pre, response)
