Deliverability Check (Grade A) logo

Deliverability Check (Grade A)Security-tested data-ai skill for Claude AI. Grade A. Audit a sending domain's deliverability — SPF, DKIM, DMARC, MX, BIMI, blocklists — with a prioritized fix order

— (0)
Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

The Deliverability Check tool audits a sending domain's email authentication and deliverability posture. It checks SPF, DKIM, DMARC, MX, BIMI, and blocklists, providing a prioritized fix order. This tool is useful for users whose open rate has dropped and they don't know why. It explains every finding in plain English, making it easier to understand and address deliverability issues. The tool can be used for a root domain or a specific subdomain. It identifies the provider from the MX records and checks for various SPF, DKIM, and DMARC configurations. It also checks for BIMI setup and MTA-STS and TLS-RPT configurations. The tool is designed to help users improve their email deliverability and prevent issues like permfail, permerror, and being flagged as spam.

Key features

  • SPF (Sender Policy Framework) check
  • DKIM (DomainKeys Identified Mail) check
  • DMARC (Domain-based Message Authentication) check
  • MX records check
  • BIMI (Brand Indicators for Message Identification) check
  • MTA-STS and TLS-RPT check

Pricing

Model
Free
Category
Skills
Rating
No reviews yet

Use cases

Email Deliverability Audit

Perform a comprehensive audit of a sending domain's email deliverability posture, including SPF, DKIM, DMARC, MX, BIMI, and blocklists.

Troubleshooting Email Issues

Use the tool to identify and prioritize fixes for email deliverability issues, such as permfail, permerror, or being flagged as spam.

New Domain Setup

Run the tool to ensure a new sending domain or subdomain is properly configured for optimal email deliverability.

Pros & Cons

Pros

  • Provides a comprehensive audit of email deliverability
  • Identifies and prioritizes fixes for deliverability issues
  • Explains technical findings in plain English
  • Supports checking for subdomains
  • Helps improve email deliverability and prevent spam issues

Cons

  • Requires technical knowledge to fully understand and implement fixes
  • May not cover all possible email deliverability scenarios
  • Limited to checking specific configurations and providers

Reviews

Sign in to leave a review.

No reviews yet. Be the first!

Q&A

Can the tool check subdomains?

Yes, the tool can be used for a root domain or a specific subdomain, and it identifies the provider from the MX records.

Asked by Petra Vogel · Jun 30, 2025

What are the key features of the tool?

The key features include SPF, DKIM, DMARC, MX records, BIMI, and MTA-STS and TLS-RPT checks, providing a comprehensive audit of email deliverability.

Asked by Jana Krejčí · Jul 3, 2025

Is the tool easy to understand?

The tool explains every finding in plain English, making it easier to understand and address deliverability issues, but requires technical knowledge to fully understand and implement fixes.

Asked by Wei Chen · Jun 3, 2025

What does the Deliverability Check tool do?

The Deliverability Check tool audits a sending domain's email authentication and deliverability posture, checking SPF, DKIM, DMARC, MX, BIMI, and blocklists, and provides a prioritized fix order.

Asked by Ulla Nielsen · May 16, 2025

Ask a question

Skills alternatives

Using Git Worktrees (Grade A) logo
Using Git Worktrees (Grade A)Skills

Security-tested data-ai skill for Claude AI. Grade A. Use when starting feature work that needs isolation from current workspace or before executing implementation plans - creates isolated git worktre

— (0)
Free
Ga4 Bigquery Schema (Grade A) logo
Ga4 Bigquery Schema (Grade A)Skills

Security-tested data-ai skill for Claude AI. Grade A. GA4 BigQuery Export Schema Reference — complete field reference, nested structures, query patterns, and performance tips

— (0)
Free
Meta Capi (Grade A) logo
Meta Capi (Grade A)Skills

Security-tested data-ai skill for Claude AI. Grade A. Meta Conversions API (CAPI) Setup Reference — architecture, event types, customer information hashing, deduplication, implementation examples, AEM

— (0)
Free
Callees (Grade A) logo
Callees (Grade A)Skills

Security-tested development skill for Claude AI. Grade A. Lista o que uma funcao/metodo chama (call graph direto)

— (0)
Free
Test Module Name (Grade A) logo
Test Module Name (Grade A)Skills

Security-tested data-ai skill for Claude AI. Grade A. Name Haskell test modules after the module under test with a Spec suffix in the same namespace. Use when writing or reviewing Haskell test module

— (0)
Free
Board Of Directors (Grade A) logo
Board Of Directors (Grade A)Skills

Security-tested data-ai skill for Claude AI. Grade A. Simulate a 5-member expert board deliberation for major decisions. Use when evaluating plans, architecture choices, feature designs, or any decisi

— (0)
Free
Advpl Mvc Avancado (Grade A) logo
Advpl Mvc Avancado (Grade A)Skills

Security-tested development skill for Claude AI. Grade A. MVC avançado via PE (Pontos de Entrada) — adicionar grids customizadas em telas MVC padrão (CNTA300/MATA070/MATA440/MATA460/FINA040 via *STRU)

— (0)
Free
D
Docs Writer (Grade A)Skills

Security-tested devops skill for Claude AI. Grade A. **WORKFLOW SKILL** — Maintains repository documentation accuracy and freshness across the docs site, agent files, and changelog. WHEN: "update docs

— (0)
Free