Code Snippet Library / Cold Outreach

Deliverability Composite Risk Score

The Deliverability Composite Risk Score is a free JSON Schema-free JS scoring function that folds DNS authentication (SPF/DKIM/DMARC), domain age, and bounce/complaint rates into a single 0-100 risk score, grounded in Google/Yahoo's published 2024 bulk-sender rules.

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MIT
License
JSON
Language
Aug 14, 2026
Last updated
README.md View raw ↗

What this is (and isn’t)

A scoring function, not a hosted service. Runs entirely in your own environment against domain metrics you supply.

Files

FilePurpose
risk-score.jsscoreRisk() — zero dependencies
test.js14-test suite covering each risk factor and edge cases

How it differs from the Deliverability Pre-Flight Gate skill

This snippet returns a continuous 0-100 risk score with a factor-by-factor breakdown. The companion Deliverability Pre-Flight Gate skill makes a block/allow decision for a specific planned send volume. Use this one for ongoing monitoring, that one for pre-send gating.

FAQ

Is this free to use?

Yes. Free to download and use. MV3 charges $175/hr only if you want help wiring it into your real sending infrastructure.

Does my sending data get sent to MV3?

No. Validation runs entirely in your own environment.

What are the risk bands?

low (under 15), medium (15-39), high (40-69), and critical (70+), based on the composite score.

How is domain age factored in?

A brand-new domain carries inherent risk regardless of clean metrics, tapering to zero extra risk by 90 days old.

Is this the same as the Deliverability Pre-Flight Gate skill?

Related but distinct. This snippet scores risk continuously; the Pre-Flight Gate skill makes a specific block/allow decision for a planned send.

JR
Jordan Reeves
ABM & Outbound Pipeline, MV3 Marketing