(some #(when (#{"postal"} (:type %)) %)
    [{:text "123" :type "postal"}
     {:text "789" :type "physical"}])

(defn having-type
  [type]
  (fn [obj]
    (when (= (:type obj) type) obj)))
=> #'dev.playground/having-type
(some (having-type "postal")
    [{:text "123" :type "postal"}
     {:text "789" :type "physical"}])
=> {:text "123", :type "postal"}
(some (having-type "physical")
    [{:text "123" :type "postal"}
     {:text "789" :type "physical"}])
=> {:text "789", :type "physical"}