How can I disable customer emails when order create using rest api in Magento 2

Question

Is there an API call or cart/quote setting I can use to turn off customer notifications just for the order confirmation?

I create order using this api
Method:PUT
url: http://localhost/testproject/rest/V1/carts/{cart_id or quote_id}/order

Answer 1

Disable the order confirmation email from the Magento Admin and send an email programmatically for website only:

Stores > Configuration > Sales > Sales Email > Order > Enabled = No

app/code/VendorName/ModuleName/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
 <module name="VendorName_ModuleName" setup_version="1.0.0">
 <sequence>
 <module name="Magento_Checkout" />
 </sequence>
 </module>
</config>

app/code/VendorName/ModuleName/etc/frontend/events.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
 <event name="checkout_onepage_controller_success_action">
 <observer name="checkout_onepage_controller_success_action_sendmail" instance="VendorName\ModuleName\Observer\SendMailOnOrderSuccess" />
 </event>
</config>

app/code/VendorName/ModuleName/Observer/SendMailOnOrderSuccess.php

<?php
namespace VendorName\ModuleName\Observer;
use Magento\Framework\Event\ObserverInterface;
class SendMailOnOrderSuccess implements ObserverInterface
{
 /**
 * @var \Magento\Sales\Model\OrderFactory
 */
 protected $orderModel;
 /**
 * @var \Magento\Sales\Model\Order\Email\Sender\OrderSender
 */
 protected $orderSender;
 /**
 * @var \Magento\Checkout\Model\Session $checkoutSession
 */
 protected $checkoutSession;
 /**
 * @param \Magento\Sales\Model\OrderFactory $orderModel
 * @param \Magento\Sales\Model\Order\Email\Sender\OrderSender $orderSender
 * @param \Magento\Checkout\Model\Session $checkoutSession
 *
 * @codeCoverageIgnore
 */
 public function __construct(
 \Magento\Sales\Model\OrderFactory $orderModel,
 \Magento\Sales\Model\Order\Email\Sender\OrderSender $orderSender,
 \Magento\Checkout\Model\Session $checkoutSession
 )
 {
 $this->orderModel = $orderModel;
 $this->orderSender = $orderSender;
 $this->checkoutSession = $checkoutSession;
 }
 /**
 * @param \Magento\Framework\Event\Observer $observer
 * @return void
 */
 public function execute(\Magento\Framework\Event\Observer $observer)
 {
 $orderIds = $observer->getEvent()->getOrderIds();
 if (count($orderIds)) {
 $this->checkoutSession->setForceOrderMailSentOnSuccess(true);
 $order = $this->orderModel->create()->load($orderIds[0]);
 $this->orderSender->send($order, true);
 }
 return $this;
 }
}

app/code/VendorName/ModuleName/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <type name="Magento\Sales\Model\Order\Email\Container\OrderIdentity">
 <plugin name="enable_method" type="VendorName\ModuleName\Plugin\Sales\Order\Email\Container\OrderIdentityPlugin"/>
 </type>
</config>

app/code/VendorName/ModuleName/Plugin/Sales/Order/Order/Email/Container/OrderIdentityPlugin.php

<?php
namespace VendorName\ModuleName\Plugin\Sales\Order\Email\Container;
class OrderIdentityPlugin
{
 /**
 * @var \Magento\Checkout\Model\Session $checkoutSession
 */
 protected $checkoutSession;
 /**
 * @param \Magento\Checkout\Model\Session $checkoutSession
 *
 * @codeCoverageIgnore
 */
 public function __construct(
 \Magento\Checkout\Model\Session $checkoutSession
 ) {
 $this->checkoutSession = $checkoutSession;
 }
 /**
 * @param \Magento\Sales\Model\Order\Email\Container\OrderIdentity $subject
 * @param callable $proceed
 * @return bool
 */
 public function aroundIsEnabled(\Magento\Sales\Model\Order\Email\Container\OrderIdentity $subject, callable $proceed)
 {
 $returnValue = $proceed();
 $forceOrderMailSentOnSuccess = $this->checkoutSession->getForceOrderMailSentOnSuccess();
 if (isset($forceOrderMailSentOnSuccess) && $forceOrderMailSentOnSuccess) {
 if ($returnValue) {
 $returnValue = false;
 } else {
 $returnValue = true;
 }
 $this->checkoutSession->unsForceOrderMailSentOnSuccess();
 }
 return $returnValue;
 }
}

• Gagan: I want to disable order confirmation from api side not website side.
• Pratik Oza: Please implement above code once and place order using API.
• Gagan: after follow this steps not sending emails of website orders.Please suggest how to send emails in website.
• Pratik Oza: Try above updated code.
• Gagan: I try updated code but not getting any email. I recieved other emails like customer registration but not getting order confirmation email in website.Please check