hello,

i am using this email sending code , before sending email i want to check if emai is in valid format or not like abc@xyx.com else skip it

                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient(smtp);
                mail.From = new MailAddress(emailfrom);
                //Email acpe = new Email();
                //mail.To.Add("in");
                mail.Bcc.Add(email);

                StreamReader reader = new StreamReader(System.Web.HttpContext.Current.Server.MapPath("~/EmailModule/mail.html"));
                string readFile = reader.ReadToEnd();
                string myString = "";
                myString = readFile;



                myString = myString.Replace("{#Message}",  summernote.InnerText.ToString());
                myString = myString.Replace("{#userid}", id);



                mail.Subject = txtSubject.Text ;
                mail.IsBodyHtml = true;
                mail.Body = myString.ToString();

                if (fuAttachment.HasFile)
                {
                    string FileName = Path.GetFileName(fuAttachment.PostedFile.FileName);
                    mail.Attachments.Add(new Attachment(fuAttachment.PostedFile.InputStream, FileName));
                }

                SmtpServer.Port = int.Parse(TextBox2.Text);
                SmtpServer.Credentials = new System.Net.NetworkCredential(emailfrom, password);
                SmtpServer.EnableSsl = false;
                object userState = mail;
                SmtpServer.SendCompleted += new SendCompletedEventHandler(SMTPClientForAsy.SmtpClient_OnCompleted);
                SmtpServer.SendAsync(mail, userState);