Magento 2 Send email after order is canceled

Question

I searched the internet and founded nothing.

I need to send an email to customer when the order is canceled. I've founded the trigger order_cancel_after when the order is canceled, but that' all i founded.

Answer 1

order_cancel_after -> it's dispatched in the cancel method of \Magento\Sales\Model\Order :

public function cancel()
{
    if ($this->canCancel()) {
        $this->getPayment()->cancel();
        $this->registerCancellation();

        $this->_eventManager->dispatch('order_cancel_after', ['order' => $this]);
    }

    return $this;
}

Source : What is the event will fire after cancelled the order in Magento 2

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Magento does send a number of transnational emails, including cancellation. (e.g. order status change); the only issue with a cancellation email, requires the customer service agent cancelling to click Notify Customer. You can edit this to be the default.

To enable emails on order comments, go to Store > Configuration > Sales > Sales Emails and make sure order comment is enable. It take from your E-mail template

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FYI : This class Magento\Sales\Helper\Data send all email for order transaction.