如何将带有发件人附件的电子邮件自动转发到多个电子邮件地址？

import imaplib
import smtplib
from email.parser import BytesParser

# 邮件服务器地址和认证信息
imap_server = 'imap.example.com'
smtp_server = 'smtp.example.com'
username = 'your_username'
password = 'your_password'

# 连接到邮件服务器
imap_conn = imaplib.IMAP4(imap_server)
imap_conn.login(username, password)

# 选择收件箱
imap_conn.select('INBOX')

# 搜索带有附件的邮件
_, message_ids = imap_conn.search(None, 'HASATTACH')
for message_id in message_ids[0].split():
    _, data = imap_conn.fetch(message_id, '(RFC822)')
    msg = BytesParser().parsebytes(data[0][1])

    # 构建转发邮件
    forward_msg = msg
    forward_msg.replace_header('From', 'your_email@example.com')
    forward_msg.replace_header('To', 'recipient1@example.com, recipient2@example.com')
    forward_msg.replace_header('Subject', 'Forwarded: ' + msg['Subject'])

    # 连接到SMTP服务器并发送邮件
    smtp_conn = smtplib.SMTP(smtp_server)
    smtp_conn.login(username, password)
    smtp_conn.sendmail('your_email@example.com', ['recipient1@example.com', 'recipient2@example.com'], forward_msg.as_bytes())
    smtp_conn.quit()

# 关闭连接
imap_conn.close()
imap_conn.logout()