rampstackco/claude-skills · skills/email-deliverability/SKILL.md

email-deliverability skillA

email-deliverability is agent-read markdown (skill) from rampstackco/claude-skills: Make sure email actually reaches inboxes. Use this skill when setting up email authentication (SPF, DKIM, DMARC), diagnosing emails landing in spam, planning a domain reputation strategy, monitoring sender reputation, or hardening against email spoofing. Triggers on email deliverability, SPF, DKIM, DMARC, spam folder, sender reputation, mailbox provider, soft bounces, bounce rate, BIMI, MTA-STS, deliverability audit. Also triggers when a marketing or transactional email isn't reaching users..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add rampstackco/claude-skills/email-deliverability@git:20260507.ac2b078
Exact content
mdr add rampstackco/claude-skills/email-deliverability@sha256:d321d0661dbb4715

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_ssd3f4sqh2n2chtc.svg)](https://markdownregistry.com/a/art_ssd3f4sqh2n2chtc)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260507.ac2b078 latest2026-05-07 ac2b078 11,489 BA view · diff
git:20260505.c80b8962026-05-05 c80b896 11,449 BA view · diff
git:20260428.f066ffe2026-04-28 f066ffe 11,329 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (11489 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

rampstackco/claude-skills · 878 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ssd3f4sqh2n2chtc
GET https://markdownregistry.com/api/v1/resolve?ref=rampstackco/claude-skills/email-deliverability
GET https://markdownregistry.com/api/v1/blob/d321d0661dbb471567570631f1b7ee031a7d96e1696206770af362eb2f1119e3

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.