Python 3嵌入的图像未附加在电子邮件中

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.image import MIMEImage

# 邮件服务器的地址和端口
smtp_server = 'smtp.example.com'
smtp_port = 587

# 发件人和收件人的邮箱地址
sender_email = 'sender@example.com'
receiver_email = 'receiver@example.com'

# 创建一个带有附件的邮件对象
msg = MIMEMultipart()
msg['From'] = sender_email
msg['To'] = receiver_email
msg['Subject'] = '带有附件的邮件'

# 添加邮件正文
body = MIMEText('这是一封带有附件的邮件。')
msg.attach(body)

# 添加图像附件
with open('image.jpg', 'rb') as f:
    image_data = f.read()
image = MIMEImage(image_data)
image.add_header('Content-Disposition', 'attachment', filename='image.jpg')
msg.attach(image)

# 连接到邮件服务器并发送邮件
with smtplib.SMTP(smtp_server, smtp_port) as server:
    server.starttls()
    server.login(sender_email, 'password')
    server.send_message(msg)

print('邮件发送成功！')