我看到了以下问题，但我仍然有一些疑问。
从通讯组列表发送电子邮件
首先，我有一个单独的邮件帐户以及用于特定邮件服务器中的组的分发 ID。我可以通过 Outlook 从分发邮件 ID 发送邮件，只需指定From场地。它不需要身份验证。
我一直使用以下代码通过我的个人帐户发送邮件：
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import os
FROMADDR = "[email protected]"
GROUP_ADDR = ['[email protected]']
PASSWORD = 'foo'
TOADDR = ['[email protected]']
CCADDR = ['[email protected]']
# Create message container - the correct MIME type is multipart/alternative.
msg = MIMEMultipart('alternative')
msg['Subject'] = 'Test'
msg['From'] = FROMADDR
msg['To'] = ', '.join(TOADDR)
msg['Cc'] = ', '.join(CCADDR)
# Create the body of the message (an HTML version).
text = """Hi this is the body
"""
# Record the MIME types of both parts - text/plain and text/html.
body = MIMEText(text, 'plain')
# Attach parts into message container.
msg.attach(body)
# Send the message via local SMTP server.
s = smtplib.SMTP('server.com', 587)
s.set_debuglevel(1)
s.ehlo()
s.starttls()
s.login(FROMADDR, PASSWORD)
s.sendmail(FROMADDR, TOADDR, msg.as_string())
s.quit()
这工作得很好。由于我可以通过 Outlook 从分发邮件 ID 发送邮件（无需任何密码），有什么方法可以修改此代码以通过分发 ID 发送邮件？我尝试注释掉
s.ehlo()
s.starttls()
s.login(FROMADDR, PASSWORD)
部分，但代码给了我以下错误：
send: 'mail FROM:<[email protected]> size=393\r\n'
reply: b'530 5.7.1 Client was not authenticated\r\n'
reply: retcode (530); Msg: b'5.7.1 Client was not authenticated'
send: 'rset\r\n'
Traceback (most recent call last):
File "C:\Send_Mail_new.py", line 39, in <module>
s.sendmail(FROMADDR, TOADDR, msg.as_string())
File "C:\Python32\lib\smtplib.py", line 743, in sendmail
self.rset()
File "C:\Python32\lib\smtplib.py", line 471, in rset
return self.docmd("rset")
File "C:\Python32\lib\smtplib.py", line 395, in docmd
return self.getreply()
File "C:\Python32\lib\smtplib.py", line 371, in getreply
raise SMTPServerDisconnected("Connection unexpectedly closed")
smtplib.SMTPServerDisconnected: Connection unexpectedly closed
有人能帮我一下吗？
