126邮箱的发送

 private void btnsend_Click(object sender, EventArgs e)
        {
            MailMessage msg = new MailMessage();
            msg.Body = this.txtcontent.Text;//内容
            msg.Subject = this.txttitle.Text;//标题

            msg.From = new MailAddress("[e-mail]");//邮件的由来
            msg.To.Add(txtshou.Text);

            SmtpClient sc = new SmtpClient();//传输smtp
            sc.Host = "smtp.126.com";//发件方服务器地址
            sc.Port = 25;//发件方端口

            NetworkCredential credential = new NetworkCredential();//发件方端口
            credential.UserName = "[e-mail]";
            credential.Password = "xiaofei0809";
            sc.Credentials = credential;//把证书提交给代理
            sc.Send(msg);
        }