How could I link a MySQL database I have created which stores e-mail addresses into a PHP Script which can be called when checking if an e-mail alias is taken or not. I can implement the PHP file, just not the MySQL link accross into it, and are their any programs which would help me in bulk e-mailing some of my Newsletters.
PHP has an inbuilt mail function ( http://www.php.net/manual/ref.mail.php ) that you can use. However I recommend you buy Professional PHP programming buy Wrox, my business partner tells me it is a very good book to read and that it has information about email and PHP in it.
KDA Web Services
"Everyone has a photographic memory. Some just don't have film."
As for linking your MySQL database to your PHP script, my tutorial series on SitePoint.com has all the information you need:
Building a Database-Driven Web Site using PHP & MySQL
Helping Small Business Grow Online!