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Newsletter: get out of the spam folder v1.0.0

Use this resource to diagnose and fix a newsletter's deliverability problems

New

  • 554 downloads
  • 105 likes
  • 250 saves

$4.99

Lifetime access to this resource, with its updates.

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install newsletter-deliverability-fixer

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent runs a short interview, then follows an ordered triage (delivery state, authentication, blocklists, complaints, list events, content last). It corrects common misconceptions along the way and ranks the causes. You get a report with a direct answer, an evidence table, a fix plan with owners and dates, and a monitoring sheet.

Mostly picked by

Updated November 2, 2026

Preview of a deliverability report with an evidence table and fix plan

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: the six-step triage, choosing a sending identity, warm-up and bounce handling
  • references/authentication-and-headers.md: DNS record formats, one-click headers and the DMARC ladder
  • references/provider-rules.md and bounces-and-restarts.md: Gmail, Yahoo and Outlook rules, restart cohorts
  • references/diagnosis-example.md: a worked diagnosis and a negative example

Good fit for

  • Your newsletter or digest started landing in spam after a tool change
  • You need to know which DNS records your sending tool requires
  • You want to restart a silent list without damaging your reputation

Not for

  • Cold sales outreach
  • Transactional emails
  • Growing the list or collecting consent

Tags

  • newsletter
  • deliverability
  • dmarc
  • spam
  • email

About

You say

"Our monthly newsletter has been landing in spam since we left Mailchimp. Here are the headers of a received issue, help me find the cause."

Preview of a deliverability report with an evidence table and fix plan

Skill published by Samuel Berthe under the MIT license.

Show more

Prerequisites

You bring
The name of your sending tool and your sending domain and Raw headers of a received issue or the bounce log, if you have them

How to use it

  1. Place the skill in your agent's skills folder
  2. Describe your sending tool, your domain and what changed, and paste the raw headers if you have them
  3. Apply the fix plan in the order given and track the signals in the monitoring sheet

Content preview

Files

  • LICENSE1.1 KB
  • NOTICE-PALATEKIT.md0.4 KB
  • references/authentication-and-headers.md6.7 KB
  • references/bounces-and-restarts.md5.3 KB
  • references/diagnosis-example.md3.9 KB
  • references/provider-rules.md7.8 KB
  • SKILL.md19 KB

Origin and licence

Modified by PalateKit

Author
samber
Source
github.com/samber/developer-relations-skills/tree/a12240a5a8a15a460ab17aa870df37f14814bf7d/skills/devrel-newsletter-deliverability
Licence
MIT

Notice

Version modifiée de « devrel-newsletter-deliverability » (samber, MIT) : traduction française et fiche par PalateKit.

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Frequently asked questions

Does this skill depend on other skills?

No, it works on its own. It points to neighboring skills (growth, program, issue writing) for out-of-scope topics, but does not need them to diagnose deliverability.

Is it only for developer newsletters?

The examples come from DevRel newsletters, but the diagnosis (authentication, complaints, bounces, warm-up) applies to any opt-in newsletter.