How to create an Email queue mechanism in ASP.NET In case of network goes down? -

i developing website using asp.net. in there sending emails users.

currently using code send email asynchronously user. emails sending in background.

public static void sendemail(string path, string emailto) {     thread emailthread = new thread(delegate()     {         try         {             string body = string.empty;             using (streamreader reader = new streamreader(path))             {                 body = reader.readtoend();             }             mailmessage mail = new mailmessage();              mail.from = new mailaddress("test@test.com");             mail.to.add(emailto);             mail.subject = "test email";             mail.body += body;             mail.isbodyhtml = true;              smtpclient smtpclient = new smtpclient("smtp.test.com");                         smtpclient.port = 587;             smtpclient.deliverymethod = smtpdeliverymethod.network;             smtpclient.usedefaultcredentials = false;             smtpclient.credentials = new system.net.networkcredential("test@test.com", "test");             smtpclient.enablessl = true;              smtpclient.sendcompleted += (s, e) =>             {                 smtpclient.dispose();                 mail.dispose();             };             try             {                 smtpclient.send(mail);             }             catch (exception ex) { /* exception handling code here */ }         }         catch (exception)         {              throw;         }     });     emailthread.isbackground = true;     emailthread.start(); } 

so above code working fine. 1 day got problem. when press send button @ same time internet connection down. email didn't fired. thats time realize email function need mechanism queue emails , send users 1 one according order in queue. if email got undelivered or if network gets down retry it. how achieve mechanism?

decouple queuing of emails sending them. e.g.:

1. create database table outgoing emails, column sent date.
2. whenever want send outgoing email, insert table null sent date.
3. have background task run every x seconds check emails null sent date, try sending them, , update sent date if successful. hint: easy way queue recurring tasks in asp.net have @ this.

this stripped bone simple example, can expand on it.