邮件发送

private void button1_Click(object sender, EventArgs e)
        {
            MailMessage msg = new MailMessage();
            msg.Body = this.textBox3.Text;
            msg.Subject = this.textBox2.Text;
          
            msg.From=new MailAddress("11******72@qq.com");
            msg.To.Add("11********72@qq.com");
            SmtpClient client = new SmtpClient();
            client.Host = "smtp.qq.com";
            client.Port = 25;//获取或设置用于smtp事物的端口。
            NetworkCredential credetial = new NetworkCredential();
            credetial.UserName = "用户名";
            credetial.Password = "密码";
            client.Credentials = credetial;
            client.Send(msg);
        }