SmtpClient ss = new SmtpClient("smtp.server.com",25);
                ss.Credentials = new NetworkCredential("KerioUser<_at_>server.com", "A11b6015!");
                ss.EnableSsl = true;
                ss.DeliveryMethod = SmtpDeliveryMethod.Network;
                ss.UseDefaultCredentials = false;
                ss.Timeout = 999999;
                MailMessage mm = new MailMessage("KerioUser@server.com", "armandelta2002<_at_>gmail.com", "subject here", "my body");
                mm.BodyEncoding = UTF8Encoding.UTF8;
                mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
                ss.Send(mm);