Magento 2 Agregar CC TransportBuilder
<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
* MyCompany Email.
*/
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\Framework\Mail\Template\TransportBuilder">
<plugin name="mycompany_email" type="MyCompany\Email\Plugin\CcPlugin"/>
</type>
</config>
Nasty Newt