身份验证失败，因为远程方已关闭传输流c#发送电子邮件

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

class Program
{
    static void Main()
    {
        try
        {
            // 配置邮件服务器信息
            SmtpClient client = new SmtpClient("邮件服务器地址", 邮件服务器端口);
            client.UseDefaultCredentials = false;
            client.Credentials = new NetworkCredential("用户名", "密码");
            client.EnableSsl = true; // 如果需要使用SSL/TLS加密连接，设置为true

            // 创建邮件对象
            MailMessage message = new MailMessage();
            message.From = new MailAddress("发件人邮箱");
            message.To.Add("收件人邮箱");
            message.Subject = "邮件主题";
            message.Body = "邮件内容";

            // 发送邮件
            client.Send(message);

            Console.WriteLine("邮件发送成功");
        }
        catch (Exception ex)
        {
            Console.WriteLine("邮件发送失败：" + ex.Message);
        }
    }
}