private static Timer _timer;
public void Init(HttpApplication HttpApplication)
{
     if (_timer == null)
     {
         _timer = new Timer(new TimerCallback(SendEmails), 
             HttpApplication.Context, #Interval#, #Interval#);
     }
}      

public static void SendEmails(object sender)
{
     
   EmailQueue.SendQueuedMail();}      

public static void SendQueuedMail()
        {
            string SmtpServer = EmailProvider.Instance().SmtpServer;
            string UserName = EmailProvider.Instance().UserName;
            string Password = EmailProvider.Instance().Password;
            int Port = EmailProvider.Instance().Port;
            EnumEmailFormat format1 = EmailProvider.Instance().EmailFormat;
            int emailPerCycle = EmailProvider.Instance().EmailsPerCycle;
            int maxAttempts = EmailProvider.Instance().EmailAttempts;
            // قائمة بالرسائل التي أرسلت بنجاح، نحفظها هنا بشكل مؤقت
            //  لحذفها لاحقا من الجدول
            ArrayList sentEmails = new ArrayList();
            // قائمة بالرسائل التي فشل إرسالها، نحفظها هنا بشكل مؤقت لكي 
            // نقوم بزيادة عدد محاولات الإرسال لاحقاً
            ArrayList failedEmails = new ArrayList();
            // سحب مجموعة من الرسائل لإرسالها الان
            EmailCollection collection1 = 
                    EmailQueue.SelectQueuedEmails(emailPerCycle);

            if (collection1 != null)
            {
                int count = collection1.Count - 1;
                for (int i = 0; i <= count; i++)
                {
                    try
                    {
                        MailMessage message1 = new MailMessage(
                            collection1[i].EmailFrom,
                            collection1[i].EmailTo);
                        message1.Subject = collection1[i].EmailSubject;
                        message1.Body = EmailQueue.CleanEmailBody(
                            collection1[i].EmailBody,
                            format1);
                        if (format1 == EnumEmailFormat.PlainText)
                        {
                            message1.IsBodyHtml = false;
                        }
                        else
                        {
                            message1.IsBodyHtml = true;
                        }

                        
                        SmtpClient sc = new SmtpClient(SmtpServer, Port);
                        
                        System.Net.Mime.ContentType ct = new 
                                       System.Net.Mime.ContentType();
                        
                        if (collection1[i].EmailAttachment != null &&
                            collection1[i].EmailAttachment 
                                            != string.Empty)
                        {
                            Attachment attach = new Attachment(
                                  collection[i].EmailAttachment,
                                  "audio/x-pn-realaudio"
                                  );
                            message1.Attachments.Add(attach);
                        }
                        // خادم ارسال البريد يحتاج تحقق من المستخدم
                        if (UserName != null)
                        {
                            sc.UseDefaultCredentials = false;
                            sc.Credentials = new 
                                System.Net.NetworkCredential(UserName,
                                Password);
                            sc.DeliveryMethod = 
                                  SmtpDeliveryMethod.Network;
                        }

                        sc.Send(message1);
                        message1 = null;
                        sentEmails.Add(collection1[i].EmailID);
                    }
                    catch (Exception exception2)
                    {
                        ExceptionLogger.LogException(exception2);

                        if (maxAttempts > 0)
                        {
                            if (collection1[i].EmailAttempts
                                     >= maxAttempts)
                            {
                                // considered it sent,, 
                                // coz it failed many times
                                sentEmails.Add(collection1[i].EmailID);
                            }
                            else
                            {
                                // adde it to failed list,,, 
                                // to update Email Attempts later
                                failedEmails.Add(collection1[i].EmailID);
                            }
                        }
                        
                    }
                }

                if (sentEmails.Count > 0)
                {
                    EmailQueue.Delete(sentEmails);
                }

                if (failedEmails.Count > 0)
                {
                    EmailQueue.UpdateSendAttempts(failedEmails);
                }
            }
        }