如何允许来自C#的外出电子邮件自动回复

MailMessage mail = new MailMessage();
mail.From = new MailAddress("sender@example.com");
mail.To.Add("recipient@example.com");
mail.Subject = "自动回复";
mail.Body = "您的邮件已收到，我们会尽快回复您。";

SmtpClient smtpClient = new SmtpClient("smtp.example.com", 25);
smtpClient.EnableSsl = true; // 如果SMTP服务器要求使用SSL加密，则设置为true
smtpClient.Credentials = new NetworkCredential("username", "password"); // 设置SMTP服务器的用户名和密码

smtpClient.Send(mail);

using System;
using System.Net;
using System.Net.Mail;

namespace EmailAutoReply
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建邮件对象
            MailMessage mail = new MailMessage();
            mail.From = new MailAddress("sender@example.com");
            mail.To.Add("recipient@example.com");
            mail.Subject = "自动回复";
            mail.Body = "您的邮件已收到，我们会尽快回复您。";

            // 配置SMTP客户端
            SmtpClient smtpClient = new SmtpClient("smtp.example.com", 25);
            smtpClient.EnableSsl = true;
            smtpClient.Credentials = new NetworkCredential("username", "password");

            // 发送邮件
            smtpClient.Send(mail);
        }
    }
}