title: Send Order On Hold Email for a specific shipping method in Woocommerce
body: <p>I am using Wordpress 4.9.6 and WooCommerce version 3.4.3 and I need to send 'Order on Hold' email for a specific shipping method.</p>
  
  <p>Reason?
  I use DHL shipping plugin to calculate shipping and an 'Alternate' shipping method is also available. If the user chooses DHL shipping while checking out, the shipping cost is calculated and the order is good to go. However, if they choose the 'Alternate' shipping method, I got to inform them that their order is on hold till they pay for shipping because the 'Alternate' method is 'Free Shipping' renamed and I will issue a separate invoice for them to pay for shipping once they have ordered.</p>
  
  <p>Searching for a solution to my problem, I have found some code that matches my needs in this answer thread: <a href="https://stackoverflow.com/questions/46083022/customizing-woocommerce-new-order-email-notification-based-on-shipping-method/46087023#46087023">Customizing Woocommerce New Order email notification based on shipping method</a></p>
  
  <p>But I am unable to figure out how to edit this code in order to make it work for my specific scenario.</p>
  
  <p>Your help is greatly appreciated.</p>