Milter, LMTP, LDA and Virtual look like competing choices. They are not. The real dividing line in Postfix email architecture is the moment your server says 250 OK and accepts responsibility for a message.
You built a comments system. Users are submitting feedback. But you only find out when you remember to check the D1 console. By then, someone has been waiting days for a response. This post covers three approaches to getting notified when form submissions arrive: instant emails, daily digests, and webhook-based notifications. Each has trade-offs in complexity, cost, and flexibility. The Problem The comments system from my previous post stores submissions in Cloudflare D1. Moderation happens manually via SQL queries in the D1 console. This works, but it requires actively checking for new submissions. ...