1) get a cheap-o webhost that offers cron job support 2) learn some PHP + MySQL 3) Use PHP's built-in 'mail()' function to send an e-mail 4) Set up a cron jo

1) get a cheap-o webhost that offers cron job support 2) learn some PHP + MySQL 3) Use PHP's built-in 'mail()' function to send an e-mail 4) Set up a cron job that runs the PHP file at 4AM