A usefull function to send mail

A very usefull function() example to send mail quickly.
It's not just that - you can't send via SMTP without either loading the autoloader or loading the SMTP class explicitly. `__autoload` has been there since PHP 5.0, which is as far back as we support. The PHPMailer autoloader has support for __autoload, SPL autoloading, and PSR-0 autoloading via composer.