我不知道如何设置自动邮件

import smtplib
import schedule
import time

def send_email():
    # 设置发件人、收件人和邮件内容
    from_addr = 'your_email@example.com'
    to_addr = 'recipient@example.com'
    subject = '自动邮件'
    body = '这是一封自动发送的邮件。'

    # 连接到SMTP服务器
    smtp_server = 'smtp.example.com'
    smtp_port = 587
    smtp_username = 'your_username'
    smtp_password = 'your_password'
    smtp_conn = smtplib.SMTP(smtp_server, smtp_port)
    smtp_conn.starttls()
    smtp_conn.login(smtp_username, smtp_password)

    # 构造邮件内容
    msg = f"From: {from_addr}\r\nTo: {to_addr}\r\nSubject: {subject}\r\n\r\n{body}"

    # 发送邮件
    smtp_conn.sendmail(from_addr, to_addr, msg)
    smtp_conn.quit()

# 每天定时发送邮件
schedule.every().day.at("09:00").do(send_email)

while True:
    schedule.run_pending()
    time.sleep(1)