You can start a thread which handles sending the emails. The thread can be started when the application starts. Use Application_Start function in Global.asax to do so. Here is what your code will look like .. its not tested but will give you a fair idea of what I am talking about.
public System.Threading.Thread emailSender = null;
protected void Application_Start(object sender, EventArgs e)
{
emailSender = new System.Threading.Thread(
new System.Threading.ThreadStart(RunEmailSender));
emailSender.Start();
}
private void RunEmailSender()
{
// Always keep running.
while (true)
{
System.Threading.Thread.Sleep(60000);
try
{
SendEmails();
}
catch (Exception ex)
{
// Log any exceptions here
}
}
}
private void SendEmails()
{
}