Avoid partial merging of system mailer config with sender config

Author: wmnnd

config/runtime.exs

@@ -114,7 +114,7 @@ if config_env() == :prod do
           end)
       end
 
-    config(:keila, Keila.Mailer, config)
+    config(:keila, Keila.Auth.Emails, config)
   rescue
     e ->
       exit_from_exception.(e, """

lib/keila/auth/emails.ex

@@ -5,9 +5,11 @@ defmodule Keila.Auth.Emails do
 
   @spec send!(atom(), map()) :: term() | no_return()
   def send!(email, params) do
+    config = Application.get_env(:keila, __MODULE__, [])
+
     email
     |> build(params)
-    |> Keila.Mailer.deliver!()
+    |> Keila.Mailer.deliver!(config)
   end
 
   @spec build(:activate, %{url: String.t(), user: Keila.Auth.User.t()}) :: term() | no_return()