高分求winform C#邮件群发代码！

public static bool SendEmail(string title, string content)

        {

            bool r = false;

            try

            {

                MailMessage msg = new MailMessage();                

                msg.To.Add("aaa@126.com");//收件人，可多人

                msg.CC.Add("bbb@126.com");//抄送，可多人，如下

                msg.CC.Add("ccc@126.com");

                msg.From = new MailAddress("ddd@126.com", "", System.Text.Encoding.UTF8);

                msg.Subject = title;//邮件主题

                msg.SubjectEncoding = System.Text.Encoding.UTF8;//主题编码

                msg.Body = content;//邮件内容

                msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码

                msg.IsBodyHtml = false;

                msg.Priority = MailPriority.High;//优先级

                SmtpClient client = new SmtpClient();

                client.Credentials = new System.Net.NetworkCredential("ddd@gmail.com", "123456");//发件人地址，密码

                client.Port = 587;

                client.Host = "smtp.gmail.com";

                client.EnableSsl = true;

                object userState = msg;

                client.Send(msg);

                r = true;

            }

            catch (System.Net.Mail.SmtpException ex)

            {

                log.WriteLine("发送邮件异常");

            }

            return r;

        }

System.Net.Mail.SmtpClient client = new SmtpClient();

            client.Host = "smtp.126.com";

            client.UseDefaultCredentials = false;

            client.Credentials = new System.Net.NetworkCredential("账号", "******");

            //星号改成自己邮箱的密码

            client.DeliveryMethod = SmtpDeliveryMethod.Network;



            System.Net.Mail.MailMessage message = new MailMessage("账号", "目的邮箱");

            message.To.Add("ixake@126.com");//可以发送给多人

              message.to.Add("cc@qq.com");   //如果还有更多...可以继续..

            

                        

            message.Subject = "测试";

            message.Body = ("这是邮件的内容");

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

            message.IsBodyHtml = true;

           



            try

            {

                client.Send(message);

                MessageBox.Show("Email successfully send.");

            }

            catch (Exception ex)

            {

                MessageBox.Show("Send Email Failed." + ex.ToString());

            }