email-deliverability SKILL.md skillA
email-deliverability from skillmedev/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add skillmedev/skills/email-deliverability@git:20261005.bea4ea5Pins git:20261005.bea4ea5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- skillmedev/skills
- Path
skills/email-deliverability/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261005.bea4ea5, committed Oct 5, 2026
- First version recorded
- Jul 5, 2026
- Size
- 8,860 bytes
- Repository stars
- 19
- License
- MIT
Audits and protects sender reputation and inbox placement for permissioned marketing and lifecycle email - SPF, DKIM, and DMARC authentication, domain warmup, bounce and complaint thresholds, and engagement sunsetting - and delivers a scored deliverability audit checklist with a remediation order. Use when someone asks "why are my newsletters going to spam", "how do I set up SPF, DKIM, and DMARC", "is my bounce rate too high", "should I send marketing from a subdomain", or is launching a new…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Email Deliverability Sender reputation takes months to build and days to destroy, and most teams discover a deliverability problem only after open rates have already cratered. This skill audits and protects inbox placement for permissioned marketing and lifecycle email - authentication, warmup, list hygiene, and engagement - and returns a scored audit with fixes in dependency order. It exists to catch the silent killers (an unenforced DMARC policy, a stale segment, a skipped warmup) before an inbox provider does. ## Operating procedure Work the steps in order: authentication failures poison every downstream metric, so fix identity before hygiene, and hygiene before engagement. ### Step 1: Gather inputs Collect these before auditing anything. If a number is estimated, label it a guess and verify against the ESP dashboard before the audit ships. - Sending domain(s), and whether marketing and transactional mail share one identity. - ESP(s) in use; shared or dedicated sending IP. - List size, acquisition sources (signup form, import, purchase - a purchased source is an automatic red flag), and list age. …
Read the whole file at its exact version.
How to install
mdr add skillmedev/skills/email-deliverability@sha256:e4526dc94a1c98b6The line at the top of this page pins the label git:20261005.bea4ea5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_72v6pqnqjq3kxkdk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 5, 2026 and Oct 5, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.bea4ea5 latest | 2026-10-05 | bea4ea5 | 8,860 B | A | view · diff |
| git:20260705.a28c4ce | 2026-07-05 | a28c4ce | 8,818 B | A | view · diff |
| git:20260705.acb5571 | 2026-07-05 | acb5571 | 8,860 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8860 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
skillmedev/skills · 19 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_72v6pqnqjq3kxkdk GET https://markdownregistry.com/api/v1/resolve?ref=skillmedev/skills/email-deliverability GET https://markdownregistry.com/api/v1/blob/e4526dc94a1c98b678969b4d40e71255eb7237469582c31244e54ad3c7c5ecb0
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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