如何以编程方式发送简单的电子邮件？(存在一种简单的方法吗？)

import smtplib
from email.mime.text import MIMEText

def send_email(sender, receiver, subject, message):
    # 创建邮件内容
    msg = MIMEText(message)
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = receiver

    # 连接SMTP服务器
    smtp_server = 'smtp.example.com'  # 替换为你的SMTP服务器地址
    smtp_port = 587  # 替换为你的SMTP服务器端口号
    smtp_username = 'your_username'  # 替换为你的SMTP服务器用户名
    smtp_password = 'your_password'  # 替换为你的SMTP服务器密码
    smtp = smtplib.SMTP(smtp_server, smtp_port)
    smtp.starttls()
    smtp.login(smtp_username, smtp_password)

    # 发送邮件
    smtp.sendmail(sender, receiver, msg.as_string())
    smtp.quit()

# 调用发送邮件函数
send_email('sender@example.com', 'receiver@example.com', 'Hello', 'This is a test email.')