尝试从python vis office365发送电子邮件时出现smtp错误

import smtplib
from email.mime.text import MIMEText

# 配置SMTP服务器
smtp_server = 'smtp.example.com'
smtp_port = 587
username = 'your_username'
password = 'your_password'

# 构建邮件内容
sender = 'sender@example.com'
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:
    # 连接到SMTP服务器
    server = smtplib.SMTP(smtp_server, smtp_port)
    
    # 开启安全连接（如果需要）
    # server.starttls()
    
    # 登录SMTP服务器
    server.login(username, password)
    
    # 发送邮件
    server.sendmail(sender, recipient, msg.as_string())
    
    print('邮件发送成功')
except smtplib.SMTPException as e:
    print('邮件发送失败:', e)
finally:
    # 关闭SMTP连接
    server.quit()