使用 Python 中的 smtp 发送电子邮件时发生 SSL 错误

Question

我想使用 Outlook 发送电子邮件。代码如下：

import smtplib
from email.message import EmailMessage

msg = EmailMessage()
msg['From'] = '*******'
msg['Subject'] = 'Some subject here'
msg['To'] = '********'
        
msg.set_content('Some text here')

with smtplib.SMTP_SSL('smtp-mail.outlook.com', 587) as smtp:
    smtp.login('******', '****')
    smtp.send_message(msg)
    print('Email sent!')

我收到以下错误：

---------------------------------------------------------------------------
SSLError                                  Traceback (most recent call last)
<ipython-input-8-4d5956f55c88> in <module>
      6 msg.set_content('Some text here')
      7 
----> 8 with smtplib.SMTP_SSL('smtp-mail.outlook.com', 587) as smtp:
      9     smtp.login('sender_email', 'password')
     10     smtp.send_message(msg)

~/anaconda/envs/quant2/lib/python3.6/smtplib.py in __init__(self, host, port, local_hostname, keyfile, certfile, timeout, source_address, context)
   1029             self.context = context
   1030             SMTP.__init__(self, host, port, local_hostname, timeout,
-> 1031                     source_address)
   1032 
   1033         def _get_socket(self, host, port, timeout):

~/anaconda/envs/quant2/lib/python3.6/smtplib.py in __init__(self, host, port, local_hostname, timeout, source_address)
    249 
    250         if host:
--> 251             (code, msg) = self.connect(host, port)
    252             if code != 220:
    253                 self.close()

~/anaconda/envs/quant2/lib/python3.6/smtplib.py in connect(self, host, port, source_address)
    334         if self.debuglevel > 0:
    335             self._print_debug('connect:', (host, port))
--> 336         self.sock = self._get_socket(host, port, self.timeout)
    337         self.file = None
    338         (code, msg) = self.getreply()

~/anaconda/envs/quant2/lib/python3.6/smtplib.py in _get_socket(self, host, port, timeout)
   1037                     self.source_address)
   1038             new_socket = self.context.wrap_socket(new_socket,
-> 1039                                                   server_hostname=self._host)
   1040             return new_socket
   1041 

~/anaconda/envs/quant2/lib/python3.6/ssl.py in wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, session)
    405                          suppress_ragged_eofs=suppress_ragged_eofs,
    406                          server_hostname=server_hostname,
--> 407                          _context=self, _session=session)
    408 
    409     def wrap_bio(self, incoming, outgoing, server_side=False,

~/anaconda/envs/quant2/lib/python3.6/ssl.py in __init__(self, sock, keyfile, certfile, server_side, cert_reqs, ssl_version, ca_certs, do_handshake_on_connect, family, type, proto, fileno, suppress_ragged_eofs, npn_protocols, ciphers, server_hostname, _context, _session)
    815                         # non-blocking
    816                         raise ValueError("do_handshake_on_connect should not be specified for non-blocking sockets")
--> 817                     self.do_handshake()
    818 
    819             except (OSError, ValueError):

~/anaconda/envs/quant2/lib/python3.6/ssl.py in do_handshake(self, block)
   1075             if timeout == 0.0 and block:
   1076                 self.settimeout(None)
-> 1077             self._sslobj.do_handshake()
   1078         finally:
   1079             self.settimeout(timeout)

~/anaconda/envs/quant2/lib/python3.6/ssl.py in do_handshake(self)
    687     def do_handshake(self):
    688         """Start the SSL/TLS handshake."""
--> 689         self._sslobj.do_handshake()
    690         if self.context.check_hostname:
    691             if not self.server_hostname:

SSLError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:852)

Answer 1

Microsoft Outlook在发送电子邮件时使用STARTTLS 。所以你需要替换smtplib.SMTP_SSL为smtplib.SMTP并且你需要调用starttls

参考：smtplib.SMTP.starttls

import smtplib
from email.message import EmailMessage

sender = 'somename@outlook.com'
recipient = 'somename@gmail.com'

msg = EmailMessage()
msg.set_content('this is a test')
msg['From'] = 'somename@outlook.com'
msg['To'] = 'somename@gmail.com'
msg['Subject'] = 'test email'

with smtplib.SMTP('smtp.office365.com', 587) as server:
    server.ehlo()
    server.starttls()
    server.ehlo()
    server.ehlo()
    server.login('your_login', "your_password", initial_response_ok=True) 
    server.ehlo()
    server.sendmail(sender, recipient, msg.as_string())
    print('Email sent!')
    server.close()

这是我的 Gmail 帐户中的 Outlook 邮件。

我注意到我必须更改我的 Outlook 密码，因为它有一个\n，Python 将其读取为新行。

----------------------------------------
My system information
----------------------------------------
Platform:       macOS
OS Version:     10.15.7
Python Version: 3.9
----------------------------------------

您的问题没有确定您所拥有的 Outlook 帐户的类型。

1. 免费账号
2. 公司账户

您在下面的评论中指出，您的错误消息包括我在免费帐户ask your email administrator.中没有看到此消息，因此我假设您可能有一个公司帐户。如果您确实有后者，请查看此启用或禁用经过身份验证的客户端 SMTP 提交，因为电子邮件管理员需要在您的公司帐户上启用。Authenticated SMTP