# Blog

> Writing from the Email Fast team on deliverability, email infrastructure, verifiable systems, and the honest mechanics of the email industry.

Canonical: https://emailfast.dev/blog

Subscribe: [/blog/feed.xml](/blog/feed.xml)

- **[Who actually sends your newsletter?](/blog/who-sends-your-newsletter)** — a field
  guide to rented pipes: what your platform's own status page reveals about who
  really delivers your email.
- **[What an email receipt should look like](/blog/proof-of-delivery-receipts)** — the
  case for cryptographic proof of delivery, and the certificate format we ship.
- **[One door in](/blog/one-admission-path)** — why every send on this platform passes
  a single admission gate, and the entire class of bugs that removes.
- **[We made overclaiming a build error](/blog/overclaiming-build-error)** — how this
  website's copy is checked against a claims ledger at build time.
- **[Reading your DMARC reports](/blog/reading-dmarc-reports)** — a working guide to
  the reports mailbox providers already send you about your domain.