yahoo 邮件错误 550, b'Request failed;信箱不可用'

如何解决yahoo 邮件错误 550, b'Request failed;信箱不可用'

所以此代码适用于 gmail，当我在 yahoo 邮件上尝试时，我收到此错误（550，b'请求失败；邮箱不可用'）

mail = imaplib.IMAP4_SSL(imap_server)
mail.login(emaill,pwd)
   

# select the label to work on
print('selecting inBox folder')
    try:
        mail.select('INBox')
        _,data = mail.search(None,'(UNSEEN)')
        mail_ids = data[0]
        id_list = mail_ids.split()
            
        for mess in id_list:
            _,data = mail.fetch(mess,'(RFC822)')
            for response in data:
               if isinstance(response,tuple):
                  print('preparing email body.........')
                  msg = email.message_from_string(response[1].decode('ISO-8859-1'),policy=email.policy.default)
                        
                        # open_links(msg)
                        body_of_email = 'Hi' 
                        email_from = msg['from']
                        email_to = msg['to']
                        subject = msg['subject']
                        mssg = MIMEText(body_of_email,'plain')
                        mssg['Subject'] = subject
                        mssg['From'] = email_from
                        mssg['To'] = email_to
                        mssg['Message-ID'] = msg['Message-ID']
                        try:
                            # msg.add_header('reply-to',email_to)

                            s = smtplib.SMTP_SSL(host=smtp_server,port=port)
                            # .starttls()
                            s.login(user=emaill,password=pwd)
                            
                            s.sendmail(emaill,msg['From'],mssg.as_string())

上面的代码不起作用，但我改变了消息，让我们说'嘿你，它有效，所以我认为 MIMETest 结构有问题，请帮忙