[standalone@localhost:9990 /] /subsystem=mail:read-resource-description(access-control=true){roles=maintainer}
{
    "outcome" => "success",
    "result" => {
        "description" => "The mail subsystem",
        "attributes" => {},
        "operations" => undefined,
        "children" => {"mail-session" => {
            "description" => "Mail session definition",
            "model-description" => undefined
        }},
        "access-control" => {
            "default" => {
                "read-config" => true,
                "write-config" => true,
                "read-runtime" => true,
                "write-runtime" => true,
                "attributes" => {}
            },
            "exceptions" => {}
        }
    }
}