Mass mailing queue (possibly with PHP interprocess communication)
<p>I am building a website where users will be able to send newsletters. They will need to track the sending process and also to stop it if required. Since they may have lots of emails the actual sending will be delegated to a script which will run in the background and will be executed by the user. This script will handle all users' newsletters, only the arguments to it will be different.</p>

<p>For the user to be able to see how many mails have been sent and to stop the sending process I was thinking of implementing some sort of interprocess communication between the website and the scripts running in the background but I'm not sure how to do it.</p>

<p>Any help will be much appreciated.</p>
