What An Email Reveals

What An Email Reveals is a Data skill for Claude Code, published by useosint in osint-skills.

12 stars1 forkson useosint/osint-skillsAdded 2026/08/12+200% in starsRepository updated 2026/08/03

agent-skillsai-agentsclaudeclaude-skillscursorcursor-skillscybersecuritydigital-forensicsdue-diligencegeointinformation-gatheringinfosecinvestigationopen-source-intelligenceosintosint-toolspentestingreconnaissancesocmintthreat-intelligence

Install in seconds

Install What An Email Reveals

Copy What An Email Reveals into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/useosint/osint-skills/tree/main/skills/what-an-email-reveals ~/.claude/skills/what-an-email-reveals

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/useosint/osint-skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/what-an-email-reveals/SKILL.md in useosint/osint-skills
Installs to: ~/.claude/skills/what-an-email-reveals
Collection: One of 25 skills cataloged from this repository
Category: Data — 668 skills

What What An Email Reveals does

What An Email Reveals investigates an email address with MX and syntax checks, Gravatar lookup, corporate format inference, breach exposure, and mail-header analysis. Use it for email OSINT, phishing triage, vendor verification, and tracing suspicious messages.

What An Email Reveals is cataloged under Data on DirSkills. What An Email Reveals comes from a repository tagged agent-skills, ai-agents, claude, claude-skills and cursor.

Documentation

README

Excerpt

What an email reveals

An email address is usually the highest-value selector in an investigation: it carries a name, a domain, an account history, and a breach footprint. The beginner error is trying to prove the address exists. Existence is the least interesting thing about it, it is the hardest thing to establish passively, and the techniques that establish it are the ones that expose you. Work the structure and the footprint first; treat validation as a bonus.

Never send mail to the subject as a research technique.

Step 1 — Authorized scope

This is the opening of the README. Read the full README on GitHub.

Frequently asked about What An Email Reveals

What else does useosint publish alongside What An Email Reveals?
What An Email Reveals is one of 25 skills that DirSkills catalogs from useosint/osint-skills, the repository it ships in. Its siblings there include Dig Through Data Brokers, Find Anyone and Find Exposed Servers. Each one is a separate skill with its own page in this directory, installs the same way What An Email Reveals does, and is maintained by useosint in that same repository. The rest of the collection is listed on the useosint/osint-skills page.
How does What An Email Reveals compare to other Data skills?
What An Email Reveals ranks #668 by stars among the 668 Data skills in this catalog. The most-starred ones next to it are Benchmark Methodology, Jupyter Notebook and Solana. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of What An Email Reveals against them. Open each page to compare what they document and how they install.