解决 Python IMAP4 连接重置错误：ConnectionResetError

The error message indicates that there was a 'ConnectionResetError' when attempting to establish a connection with the IMAP server at 'imap.qq.com'. The connection was reset by the server.

Possible reasons for this error could be:

1. Network connectivity issues: There may be a problem with your internet connection or network settings, preventing the connection to the IMAP server.
2. Firewall or security settings: Your network or system may have firewall or security settings that are blocking the connection to the IMAP server.
3. Server configuration or maintenance: The IMAP server may be undergoing maintenance or experiencing temporary issues, causing the connection to be reset.

To resolve this issue, you can try the following steps:

1. Check your internet connection: Make sure you have a stable internet connection and try again.
2. Verify server details: Double-check that the server address 'imap.qq.com' is correct and that the IMAP port (usually 993 for SSL/TLS) is not blocked.
3. Temporarily disable firewall or security software: If you have any firewall or security software enabled, temporarily disable them and try connecting again.
4. Retry after some time: If the issue persists, it could be a temporary problem with the IMAP server. Try again after some time to see if the connection can be established.

If none of these steps resolve the issue, you may need to contact your email service provider or system administrator for further assistance.