使用imap_tools批量获取Outlook邮件时遭遇EOF error问题求助

问题描述 #

我写了一个从Outlook收件箱获取邮件的Python脚本，默认调用fetch()时能正常运行，但传入bulk=True参数批量获取时，触发了SSL socket错误。

脚本代码 #

from imap_tools import MailBox

inbox = MailBox("outlook.office365.com").login("email", "password")

for email in inbox.fetch():  # bulk=True
    print(email)

错误栈 #

Traceback (most recent call last):
  File "/Users/julius/Library/Application Support/JetBrains/IntelliJIdea2022.3/scratches/scratch_1.py", line 5, in <module>
    for email in inbox.fetch(bulk=True):
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imap_tools/mailbox.py", line 171, in fetch
    for fetch_item in (self._fetch_in_bulk if bulk else self._fetch_by_one)(nums, message_parts, reverse):  # noqa
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imap_tools/mailbox.py", line 144, in _fetch_in_bulk
    fetch_result = self.client.fetch(','.join(message_nums), message_parts)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/imaplib.py", line 548, in fetch
    typ, dat = self._simple_command(name, message_set, message_parts)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/imaplib.py", line 1230, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/imaplib.py", line 1008, in _command
    raise self.abort('socket error: %s' % val)
imaplib.IMAP4.abort: socket error: EOF occurred in violation of protocol (_ssl.c:2396)

解决方案 #

• 限制单次批量获取的邮件数量：Office 365的IMAP服务器对单次请求的邮件数量有上限，超过上限会触发连接中断。通过limit参数分批获取：

  from imap_tools import MailBox
  
  inbox = MailBox("outlook.office365.com").login("email", "password")
  # 每次批量获取50封，可根据实际情况调整数值
  for email in inbox.fetch(bulk=True, limit=50):
      print(email)
  

• 调整SSL上下文配置：部分SSL协议版本兼容性问题可能导致连接中断，强制使用TLS1.2及以上版本：

  import ssl
  from imap_tools import MailBox
  
  context = ssl.create_default_context()
  # 禁用老旧的TLS版本，强制使用安全协议
  context.options |= ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
  
  inbox = MailBox("outlook.office365.com", ssl_context=context).login("email", "password")
  for email in inbox.fetch(bulk=True):
      print(email)
  

• 使用应用专用密码：如果你的Outlook账号开启了多因素认证（MFA），普通登录密码会被拦截，需要使用应用专用密码替代普通密码登录：

  1. 登录微软账户安全中心
  2. 找到“应用密码”选项，生成一个专用密码
  3. 将脚本中的密码替换为这个应用专用密码

• 延长连接超时时间：网络波动可能导致短时间内连接中断，设置更长的超时时间：

  from imap_tools import MailBox
  
  # 设置连接超时为30秒，默认一般是10-15秒
  inbox = MailBox("outlook.office365.com", timeout=30).login("email", "password")
  for email in inbox.fetch(bulk=True):
      print(email)
  

内容的提问来源于stack exchange，提问作者Julius Jonker