That makes sense. Yeah, the variable is `settings.DEFAULT_BULK_FROM_EMAIL` - so define that in `lms/envs/acceptance.py` and this test should test that `assert_in(settings.DEFAULT_BULK_FROM_EMAIL, msg.from_email)`.

I'd also recommend doing a similar `assert_in` for the subject - can you simply assert that `Hello` is in the subject (ie what the user passed in)? I'm worried about brittleness if we change what we put as the `[Test Course]` part (say we change to put in the course number rather than name).