Python脚本不会下载带有附件的HTML电子邮件

import imaplib
import email

# 邮件服务器的登录凭据
username = "your_email@example.com"
password = "your_password"

# 连接到邮件服务器
mail = imaplib.IMAP4_SSL("mail.example.com")

# 登录到邮件服务器
mail.login(username, password)

# 选择邮箱文件夹
mail.select("INBOX")

# 搜索带有附件的邮件
result, data = mail.search(None, "HAS ATTACHMENT")

# 获取邮件ID列表
email_ids = data[0].split()

# 遍历每封邮件
for email_id in email_ids:
    # 获取邮件内容
    result, data = mail.fetch(email_id, "(RFC822)")
    raw_email = data[0][1]
    email_message = email.message_from_bytes(raw_email)

    # 检查邮件是否为HTML格式
    if email_message.get_content_type() == "text/html":
        # 下载附件
        for part in email_message.iter_attachments():
            filename = part.get_filename()
            if filename:
                with open(filename, "wb") as file:
                    file.write(part.get_payload(decode=True))

# 关闭与邮件服务器的连接
mail.logout()