使用C#代码跟踪电子邮件活动

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

class Program
{
    static void Main(string[] args)
    {
        // 发件人邮箱和密码
        string senderEmail = "your_email@example.com";
        string senderPassword = "your_password";

        // 收件人邮箱
        string recipientEmail = "recipient_email@example.com";

        // 创建电子邮件消息
        MailMessage mail = new MailMessage(senderEmail, recipientEmail);
        mail.Subject = "测试邮件";
        mail.Body = "这是一封测试邮件。";

        // 创建SMTP客户端
        SmtpClient smtpClient = new SmtpClient("smtp.example.com", 587);
        smtpClient.Credentials = new NetworkCredential(senderEmail, senderPassword);
        smtpClient.EnableSsl = true;

        // 添加邮件发送完成后的事件处理程序
        smtpClient.SendCompleted += SmtpClient_SendCompleted;

        // 发送邮件
        smtpClient.SendAsync(mail, null);

        Console.WriteLine("正在发送邮件...");
        Console.ReadLine();
    }

    private static void SmtpClient_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
    {
        if (e.Cancelled)
        {
            Console.WriteLine("邮件发送被取消。");
        }
        else if (e.Error != null)
        {
            Console.WriteLine("发送邮件时出现错误：" + e.Error.Message);
        }
        else
        {
            Console.WriteLine("邮件发送成功。");
        }
    }
}