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🔐 Email Auth Deliverability Doctor
It analyzes DNS zone files, dig outputs, or nslookup text to identify technical errors and alignment issues.
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See it in action
You say
Audit the following DNS records for my domain and tell me why my emails are landing in spam: v=spf1 include:_spf.google.com include:sendgrid.net ~all and v=DMARC1; p=none;
Your agent does
Audit Findings
- Rule ID: SPF-MULTIPLE-INCLUDE
- Severity: High
- Finding: SPF record looks valid but DMARC is set to p=none.
- Evidence:
p=noneprovides no protection against spoofing. - Remediation: Once delivery is confirmed, upgrade DMARC to
p=quarantine.
What you get
About this skill
What it does
The Email Auth Deliverability Doctor is a diagnostic tool designed to audit SPF, DKIM, and DMARC records for common misconfigurations that lead to high bounce rates and spam folder placement. It analyzes DNS zone files, dig outputs, or nslookup text to identify technical errors and alignment issues.
Why use this skill
Manually debugging email authentication records is error-prone. This skill automates the process by checking your records against a comprehensive audit checklist. It helps you catch syntax errors, multiple SPF records, missing DMARC policies, and misalignment between signing domains and sender addresses without the risk of an automated tool making unauthorized changes to your live DNS.
Supported inputs
- DNS zone file exports
- Terminal output from dig or nslookup
- Local DNS configuration text files
What the output looks like
The skill produces a structured audit report including the specific rule violated, the severity of the issue, direct evidence from your records, and clear remediation guidance to fix the deliverability problem.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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Creator
JustHandled Labs builds focused agent skills for the work nobody wants to do by hand. Each one is a single repeatable job done well: catching the security and data mistakes that quietly ship, keeping docs and tests honest, gating the commands an agent is about to run, sharpening writing, and handling the founder chores around launches, outreach, and brand setup. Not generic AI productivity. Specific workflows that are easy to run, review, and repeat. Maintained by H.J. Westerfield, with a background in communications, editing, project coordination, customer support, and practical AI systems. Tools for people who want useful automation without theatrical complexity.
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