cakelog-email.php

// bootstrap.php
CakeLog::config('error', array(
	'engine' => 'File',
	'types' => array('warning', 'error', 'critical', 'alert', 'emergency'),
	'scopes' => array('warning', 'error', 'critical', 'alert', 'emergency'),
	'file' => 'error',
));
CakeLog::config('email_error', array(
	'engine' => 'File',
	'types' => array('warning', 'error', 'critical', 'alert', 'emergency'),
	'scopes' => array('email'),
	'file' => 'email_error'
));

// Some controller
CakeLog::write('error', 'Hello mono!', 'email');