email-deliverability

ericrisco/rsc-harness

SkillLoads cleanly

Use when mail already sent lands in spam, is rejected, or fails the Gmail/Yahoo bulk-sender checks and the fix is authentication and reputation, not the…

Scores
out of 100 · grade A

2026-08-06

Works

40% of the score

100/100

Loads cleanly: valid frontmatter, required fields present, no dangling references.

Maintained

25% of the score

100/100

no commits in the last 12 weeks

Adopted

20% of the score

21/100

33 stars on the source repo.

Documented

15% of the score

91/100

1,336 words with worked examples.
Ships 3 bundled files.

Loads cleanly. Every structural check Claude Code needs to register this passed. Last commit yesterday.

Install

npx skills add ericrisco/rsc-harness/email-deliverability

What it says it does

Use when mail already sent lands in spam, is rejected, or fails the Gmail/Yahoo bulk-sender checks and the fix is authentication and reputation, not the sending code: SPF/DKIM/DMARC alignment, domain warmup, spam-complaint rate, one-click unsubscribe, BIMI. NOT putting mail on the wire through a provider API (that is `email-connector`).

Every number above came out of reading the file and its repository. Nothing is a judgement call, nothing is a model’s opinion, and nothing can be paid for. The full method is published. Source last committed 2026-08-04.

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ab-testingericrisco/rsc-harness	clean	Skill	33 stars	yesterday
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aws-essentialsericrisco/rsc-harness	clean	Skill	33 stars	yesterday
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case-studiesericrisco/rsc-harness	clean	Skill	33 stars	yesterday

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