使用Outlook发送多个附件，成功但失败

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders

# 邮件配置
sender_email = 'your_email@example.com'
receiver_email = 'receiver_email@example.com'
password = 'your_password'

# 创建邮件对象
msg = MIMEMultipart()
msg['From'] = sender_email
msg['To'] = receiver_email
msg['Subject'] = 'Test Email with Multiple Attachments'

# 添加邮件正文
body = 'This is a test email with multiple attachments.'
msg.attach(MIMEText(body, 'plain'))

# 添加附件
attachments = ['file1.txt', 'file2.jpg', 'file3.pdf']
for file in attachments:
    with open(file, 'rb') as attachment:
        part = MIMEBase('application', 'octet-stream')
        part.set_payload(attachment.read())
        encoders.encode_base64(part)
        part.add_header('Content-Disposition', f'attachment; filename= {file}')
        msg.attach(part)

# 发送邮件
server = smtplib.SMTP('smtp.example.com', 587)
server.starttls()
server.login(sender_email, password)
text = msg.as_string()
server.sendmail(sender_email, receiver_email, text)
server.quit()