HI Guys, I am building a newsletter system for our site at work and i cant seem to send all the emails without the page/code falling over. We have 850,000 registered users so its not an easy task. this is my current situation: Render Email Template (Only do this once) Connect to SMTP Say Hello, Prepare server for data ( Select Current Chunk of 500 users from the DB ( Loop through chunks of 500 emails from the db Replace User-Specific Tags inside email body. update row email_sent = true ) ) Close SMTP Connection At the moment i can only reach around 50,000 emails before the page stops dead. I am utilizing various sleep() calls to try an prevent a timeout, and i have set the PHP max_timeout / memory settings etc. The site uses Mod_rewrite (built using CakePHP) so i cannot call the script from shell using /usr/bin/php/... as it will not start cakes Dispatch system etc, and will not initialize my DB Models. Would it help to call the script from exec()? Calling exec('curl -s /path/to/my/file/')? Does the Apache "Timeout" Setting have any bearing on what i am doing?? I checked out SendStudio's source code, and it seems to do the following... set_time_limit(0) <<Start firing emails>> they do not appear to be doing anything spectacular to avoid timeouts. I Have used send stduio before to email around 340,000 users without any problems so i am most confused. Any help / knowledge in this area would be great as i am absolutely up **** creek without a paddle! F.Y.I The site is on a Dedicated Linux Box at RackSpace, using PHP 4. Kinds Regards in advance, Toby de Havilland.