public function __construct() {
		// Find/replace.
		$this->placeholders = array_merge(
			array(
				'{site_title}'   => $this->get_blogname(),
				'{site_address}' => wp_parse_url( home_url(), PHP_URL_HOST ),
				'{site_url}'     => wp_parse_url( home_url(), PHP_URL_HOST ),
			),
			$this->placeholders
		);

		// Init settings.
		$this->init_form_fields();
		$this->init_settings();

		// Default template base if not declared in child constructor.
		if ( is_null( $this->template_base ) ) {
			$this->template_base = WC()->plugin_path() . '/templates/';
		}

		$this->email_type = $this->get_option( 'email_type' );
		$this->enabled    = $this->get_option( 'enabled' );

		add_action( 'phpmailer_init', array( $this, 'handle_multipart' ) );
		add_action( 'woocommerce_update_options_email_' . $this->id, array( $this, 'process_admin_options' ) );
	}