Send message to customer after the order has been created by administrator I use Drupal Commerce version 7.x-1.x. I want to Send message to customer automatically after the order has been created by administrator on page admin/commerce/orders/add. How can i done it with rules or hooks (for example mymodule_form_commerce_order_ui_order_form_alter) or other ways....
You could do that by adding a rule to fire on order update and checking to see if the order the order status was previously somestate and the current state now processing or completed.

Of course, you'd have to ensure that the states you wanted match your workflow.