[Bug]: QQ邮件登陆后后台出现乱码，且发件退件 || [Bug]: After logging in to QQ mail, garbled characters appear in the background and the mail is returned.

[Bug]: QQ邮件登陆后后台出现乱码，且发件退件 || [Bug]: After logging in to QQ mail, garbled characters appear in the background and the mail is returned. #610