public static void SendMail(string from, string to, string subject, string body, Stream attachment)
        {
            MailMessage mailMsg = new MailMessage();
            mailMsg.From = new MailAddress(from);
            mailMsg.To.Add(to);
            mailMsg.Subject = subject;
            mailMsg.IsBodyHtml = true;
            mailMsg.BodyEncoding = Encoding.UTF8;
            mailMsg.Body = body;
            mailMsg.Priority = MailPriority.Normal;

            //Message attachment
            if (attachment != null)
                mailMsg.Attachments.Add(new Attachment(attachment, "veera.text"));

            // Smtp configuration
            SmtpClient client = new SmtpClient();
            client.Credentials = new NetworkCredential("", "");
            client.Port = 25;         
            client.Host = "localhost";
            client.EnableSsl = false;

            MailMessage message = mailMsg;
            
            client.Send(message);
            
        }