{query_var:var} template tag in E-mail action, Post Load source, Post Target, Term Load source, Term Target & User Load source, Redirection & Updated Message fields. This will allow user to retrieve a specific query_var and use it dynamically{query_var:var} template tag also allow to specific key if the value is an array, using the following tag: {query_var:var:key}query_var named my-action and as value the post data (array) that has been created/updated. This query_var can be accessed using get_query_var('my-action'); or the template tag {query_var:my-action:ID} (Post ID), {query_var:my-action:post_title} (Post Title), {query_var:my-action:permalink} (Post Permalink), {query_var:my-action:admin_url} (Post Admin URL)