class-gfnewmailpoetaddon.php

  /**
     * Add subscriber info to the desired lists when submission is complete.
     */
    public function process_feed( $feed, $entry, $form ) {

 
        ..............

        try {
            $subscriber_data = \MailPoet\API\API::MP( 'v1' )->addSubscriber( $subscriber_data, $mailpoetlists,
                $options );
 
        } catch ( Exception $exception ) {
 
            // if ( 'This subscriber already exists.' == $exception->getMessage() ) {
            if ( 12 == $exception->getCode() ) {

                try {
                    if ($skipEmailValidation) {
                        $subscriber_data['status']          = 'subscribed';
                        Subscriber::createOrUpdate( $subscriber_data );
                    }
                    else {
                        $subscriber_data['status']          = 'unconfirmed';
                        Subscriber::createOrUpdate( $subscriber_data );
                        $subscriber = \MailPoet\API\API::MP( 'v1' )->subscribeToLists( $subscriber_data['email'], $mailpoetlists, $options['send_confirmation_email'] = true );
                    }
 
 
                } catch ( Exception $exception ) {
 
                }
 
            } else {
 
            }
        }
    }