如何让url启动器发送电子邮件？

import smtplib
from email.mime.text import MIMEText

def send_email(sender, receiver, subject, body):
    # 设置电子邮件内容
    message = MIMEText(body)
    message['Subject'] = subject
    message['From'] = sender
    message['To'] = receiver

    # 连接到电子邮件服务器并发送电子邮件
    smtp_server = 'your_smtp_server_address'
    smtp_port = 587
    smtp_username = 'your_smtp_username'
    smtp_password = 'your_smtp_password'

    with smtplib.SMTP(smtp_server, smtp_port) as server:
        server.starttls()
        server.login(smtp_username, smtp_password)
        server.sendmail(sender, receiver, message.as_string())

# 从URL参数中获取收件人、发件人、主题和正文信息
receiver = 'receiver@example.com'
sender = 'sender@example.com'
subject = 'Hello'
body = 'This is the email body.'

# 调用发送电子邮件的函数
send_email(sender, receiver, subject, body)