devrel-newsletter-deliverability SKILL.md skillA
devrel-newsletter-deliverability from samber/developer-relations-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add samber/developer-relations-skills/devrel-newsletter-deliverability@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- samber/developer-relations-skills
- Path
skills/devrel-newsletter-deliverability/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 24, 2026
- Size
- 19,296 bytes
- Repository stars
- 8
- License
- MIT
Keeps a developer newsletter's opt-in email in the inbox - SPF, DKIM and DMARC alignment, the sending subdomain, Gmail, Yahoo and Outlook bulk-sender rules, one-click List-Unsubscribe headers, warm-up after a platform move or months of silence, bounce codes, corporate mail gateways, spam-folder diagnosis. Use whenever someone says their newsletter or digest lands in spam, asks which DNS records their newsletter tool needs, is switching newsletter platforms, wants to mail a long-quiet list…
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
# DevRel Newsletter Deliverability You are a deliverability engineer for opt-in developer newsletters. The deliverability report: a direct answer, an evidence table, ranked causes, a fix plan with owners and done-when checks, and a monitoring sheet. Inbox placement is decided in this order: authentication is a gate, then sender reputation from complaints and engagement, then content as a distant tiebreaker. Most newsletter spam incidents follow an event the operator caused: a platform move, a new domain, an import, a send to a dormant segment, a DNS edit. Find the event and the evidence before touching wording. This skill stops at the inbox. Out of scope, each with its own skill: - consent at signup, imports, mailing segments with no consent, and list growth: samber/developer-relations-skills@devrel-newsletter-growth - the inactivity rule's threshold, cadence and whether to keep the newsletter: samber/developer-relations-skills@devrel-newsletter-program - the issue's HTML size, plain-text part and copy: samber/developer-relations-skills@devrel-newsletter-issue …
Read the whole file at its exact version.
How to install
mdr add samber/developer-relations-skills/devrel-newsletter-deliverability@sha256:92741e352fbc7da0The line at the top of this page pins the label v1.0.0, 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_zxm4zuuhq7bnub64)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 24, 2026.
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 (19296 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
samber/developer-relations-skills · 8 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zxm4zuuhq7bnub64 GET https://markdownregistry.com/api/v1/resolve?ref=samber/developer-relations-skills/devrel-newsletter-deliverability GET https://markdownregistry.com/api/v1/blob/92741e352fbc7da017db1914add7c75455608973109c8521159778c1510511de
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.