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如何修复 Python IMAP "command CLOSE illegal in state AUTH, only allowed in states SELECTED"

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问题：

你有类似这样的 Python IMAP 代码

imap-example.py
server = imaplib.IMAP4_SSL('imap.mydomain.com')
server.login('email@mydomain.com', 'password')
# ...
# 清理
server.close()

但当你运行它时，server.close() 失败并显示类似这样的错误消息

imap-traceback.txt
Traceback (most recent call last):
  File "./imaptest.py", line 13, in <module>
    server.close()
  File "/usr/lib/python3.6/imaplib.py", line 461, in close
    typ, dat = self._simple_command('CLOSE')
  File "/usr/lib/python3.6/imaplib.py", line 1196, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/usr/lib/python3.6/imaplib.py", line 944, in _command
    ', '.join(Commands[name])))
imaplib.error: command CLOSE illegal in state AUTH, only allowed in states SELECTED

解决方案

在 server.close() 之前，你必须至少运行一次 server.select()。如果有疑问，只需 server.select("INBOX") 因为这总是有效。

在 server.close() 之前插入此行：

imap-select-fix.py
server.select("INBOX")

它应该如下所示：

imap-fixed-example.py
server = imaplib.IMAP4_SSL('imap.mydomain.com')
server.login('email@mydomain.com', 'password')
# ...
# 清理
server.select("INBOX")
server.close()

完整示例请参见最小 Python IMAP over SSL 示例

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