feat: add smtp settings

test/mv/mailer_test.exs

@@ -37,9 +37,10 @@ defmodule Mv.MailerTest do
       assert {:ok, _} = Mailer.send_test_email(to_email)
 
       assert_email_sent(fn email ->
-        {_name, from_email} = Mailer.mail_from()
-        from_addresses = Enum.map(email.from, &elem(&1, 1))
-        from_email in from_addresses
+        {_name, expected_from} = Mailer.mail_from()
+        # email.from is a single {name, address} tuple in Swoosh, not a list
+        {_name, actual_from} = email.from
+        actual_from == expected_from
       end)
     end
   end