inbox-placement SKILL.md skillA
inbox-placement from chunkydotdev/email-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add chunkydotdev/email-skills/inbox-placement@git:20260330.4128460Pins git:20260330.4128460 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- chunkydotdev/email-skills
- Path
skills/deliverability/inbox-placement/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260330.4128460, committed Mar 30, 2026
- First version recorded
- Mar 30, 2026
- Size
- 26,380 bytes
- Repository stars
- 7
- License
- MIT
Understand what determines inbox vs spam placement. Use when emails land in spam, investigating Gmail Promotions tab, diagnosing deliverability issues, or optimizing engagement signals.
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
# Inbox Placement Understand the factors that determine whether your email lands in the inbox, spam folder, or a secondary tab - and how to control them. ## When to use this skill - Emails are landing in spam despite passing SPF/DKIM/DMARC - Open rates have dropped and you suspect filtering issues - You need to understand why Gmail is sending you to Promotions instead of Primary - You're launching email on a new domain and want to maximize inbox placement from the start - You want to audit your sending program for content or engagement issues - You need to set up inbox placement testing with seed lists - Emails reach Gmail but get filtered at Microsoft (or vice versa) ## Related skills - `domain-authentication` - SPF, DKIM, DMARC setup (a prerequisite for inbox placement) - `sender-reputation` - building and monitoring the reputation signals that drive placement - `email-warmup` - ramping volume on new domains/IPs to establish reputation - `spam-filter-avoidance` - deep dive on content patterns that trigger filters - `bounce-handling` - managing bounces that degrade your placement over time - `suppression-lists` - keeping your list clean to protect engagement metrics --- …
Read the whole file at its exact version.
How to install
mdr add chunkydotdev/email-skills/inbox-placement@sha256:21ba9229e5e1797cThe line at the top of this page pins the label git:20260330.4128460, 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_sk5yqgomuxxwwych)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Mar 30, 2026. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260330.4128460 latest | 2026-03-30 | 4128460 | 26,380 B | A | view · diff |
| git:20260330.c5c81fd | 2026-03-30 | c5c81fd | 26,137 B | C | 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 (26380 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
chunkydotdev/email-skills · 7 stars · license MIT · pushed 2026-10-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sk5yqgomuxxwwych GET https://markdownregistry.com/api/v1/resolve?ref=chunkydotdev/email-skills/inbox-placement GET https://markdownregistry.com/api/v1/blob/21ba9229e5e1797c2410c4870a6075bdbb12797f94172246522a91f42f0ae6ab
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.