@gnclmorais we currently can't set up Review apps, we'd never set that feature up on Heroku and in the app and since we are trying to move away from Heroku I do not want to invest time in it. We could potentially test on staging, I do wonder if we have enough seed data to meaningfully test this feature, we'd have to have thousands of members subscribed to a chapter to really be able to test it. I think this should help already, one other thing we could do is set the coach emails to deliver_later. Not sure how this works together with the handle_asynchronously method. Coach spots do not fill up as fast as student spots so I think it's not a big issue if everyone doesn't get the email at about the same time.

@gnclmorais @matyikriszta — hey 👋🏼 — we doing some housekeeping and are gonna close this PR as it's a bit stale.

We also haven't seen timeouts recently. 🥳

I think for the future of email sending, we should explore the idea of using a template and batch sending via Sendgrid/Twillio in order to make it more resilient. Then no async is required here as we can submit up to ~1000 emails in one request.