Thoughts on configuring an SMTP client.

smtp-client.clj

(require '(lime [smtp :as smtp]))

;; You can define the client yourself.

(def send-mail
  (-> (smtp/base-smtp "smtp.gmail.com" 587)
      (smtp/with-auth :PLAIN "username" "password")
      (smtp/with-starttls)))

;; Perhaps have "batteries included" client that you configure with a map.

(def send-mail (smtp/client {:server-host "smtp.gmail.com"
                             :server-port 587
                             :auth {:type :PLAIN
                                    :username "username"
                                    :password "password"}))

;; Regardless, the goal is to be able to do this:

(send-mail {:from "" :to "" :subject "" :body ""})