I really can't say enough good things about Cloudflare's ecosystem!

Specifically with workers, you can send unlimited emails for free, which is great for plugging into your existing workflows.

Another nice thing about Workers is that they can sit in your codebase as JS files alongside your front-end code and auto-deploy when you push changes to Github/Gitlab/etc.

[1] https://blog.cloudflare.com/sending-email-from-workers-with-...

[2] https://developers.cloudflare.com/workers/wrangler/ci-cd