C#发送email

 private void sendmail()
        {

            MailMessage message = new MailMessage();

            message.SubjectEncoding = Encoding.BigEndianUnicode; //邮件编码 

            var from = new MailAddress("henl@gmail.com", "Hello");//你的邮

            message.From = from;

            message.To.Add(new MailAddress("aaa@qq.com"));

            message.Subject = "测试邮件";

            message.CC.Add(new MailAddress("abc@qq.com")); //抄送

            message.IsBodyHtml = true; //正文是否是HTML

            message.BodyEncoding = System.Text.Encoding.UTF8;

            message.Body = "邮件发送测试"; //正文

            //message.Attachments.Add(new Attachment(@"c:\1.txt")); //附件

            message.Priority = System.Net.Mail.MailPriority.High; //优先级

            SmtpClient client = new SmtpClient("smtp.gmail.com", 587); // 587;//Gmail使用的端口

            client.Credentials = new System.Net.NetworkCredential("henl@gmail.com", "123456"); //这里是申请的邮箱和密码

            client.EnableSsl = true; //必须经过ssl加密

            try
            {
                client.Send(message);
                MessageBox.Show("邮件已经成功发送到" + message.To.ToString());
            }

            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
            }

        }