Not able to send mails

   public void mail(string receiver,string msg,string subject,string attachment1,string attachment2)
        {
            try
            {

                System.Net.Mail.MailMessage MyMailMessage = new System.Net.Mail.MailMessage("cecblaboratory@gmail.com", receiver, subject, msg + " < CECB Experiments Results Updates >");

                MyMailMessage.IsBodyHtml = false;

                System.Net.NetworkCredential mailAuthentication = new System.Net.NetworkCredential("xxxxx@gmail.com", "password");

                System.Net.Mail.SmtpClient mailClient = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587);

                string file = attachment1;
                string file2 = attachment2;
                Attachment attach = new Attachment(file);
                Attachment attach2 = new Attachment(file2);

                // Add the file attachment to this e-mail message.

                MyMailMessage.Attachments.Add(attach);
                MyMailMessage.Attachments.Add(attach2);

                mailClient.EnableSsl = true;
                mailClient.UseDefaultCredentials = false;
                mailClient.Credentials = mailAuthentication;
                mailClient.Send(MyMailMessage);
                MessageBox.Show("Mail sent success!");

               

            }


            catch (Exception )
            {
                MessageBox.Show("Check your Network Connection", "Invalid or Empty", MessageBoxButtons.OK, MessageBoxIcon.Error);
              

            }


////on button click event call the above method with your real data

  mail(txtreceiver.Text,txtmessage.Text,txtMailSubject.Text,lblAttach2.Text,lblAttach1.Text);