smtplib.SMTPSenderRefused：(530，b'5.7.0需要身份验证。)在烧瓶中

import smtplib
from email.mime.text import MIMEText

def send_email():
    sender = 'your_email@example.com'
    password = 'your_password'
    recipient = 'recipient@example.com'
    subject = 'Test Email'
    message = 'This is a test email.'

    msg = MIMEText(message)
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = recipient

    try:
        server = smtplib.SMTP('smtp.example.com', 587)
        server.starttls()
        server.login(sender, password)
        server.sendmail(sender, recipient, msg.as_string())
        server.quit()
        print('Email sent successfully!')
    except smtplib.SMTPSenderRefused as e:
        print('SMTPSenderRefused error:', e)

send_email()