DotNet Send Mail

    public bool SendMail(string smtp, string t_port, string from, string pwd, string to, string subject, string bodytext, string displayName, bool ssl)
        { 
            System.Net.Mail.SmtpClient client = new SmtpClient();
            client.Host = smtp;
            client.UseDefaultCredentials = true;
            client.Timeout = 135000;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
          

            client.Credentials = new System.Net.NetworkCredential(from, pwd);
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            client.Port = Convert.ToInt32(t_port);
 
            System.Net.Mail.MailMessage message = new MailMessage(from, to);
            message.From = new MailAddress(from, displayName);
            message.Subject = subject;
       
            message.Body = bodytext;
            message.IsBodyHtml = true;
            message.BodyEncoding = System.Text.Encoding.UTF8;
            client.EnableSsl = ssl;
            client.Credentials = new System.Net.NetworkCredential(from, pwd);

            Regex reg = new Regex(@"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$");

            try
            {
                if (reg.IsMatch(from) && reg.IsMatch(to))
                {
                    client.Send(message);

              
                    return true;
                }
                else
                    return false;
            }
            catch (Exception ex)
            {
           
                return false;
            }
        }