Alipay needs to log in to the mailbox in the background to receive the credit card bill of the mailbox.

The security measures for third-party login of qq mailbox are very strict. You need to open account security protection and enter a specific verification code, so you may fail to log in and cannot get the bill.

I once wanted to use a third-party mail management system to manage qq mailboxes, but other mailboxes were successfully set up, but qq mailboxes could not be solved.