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what-an-email-reveals

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By tonydzi/second-brain-starter-kit (GitHub) · coding · 15 stars · scanned at commit 552cc75

- Investigate an email address — MX and syntactic validation, Gravatar lookup, corporate email-format inference, breach exposure, and full mail-header analysis covering the Received chain, Message-ID and SPF, DKIM and DMARC results.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'what-an-email-reveals' ] || [ -L ~/.agents/skills/'what-an-email-reveals' ]; then echo 'A skill folder named what-an-email-reveals already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/tonydzi/second-brain-starter-kit' "$d" && git -C "$d" checkout --quiet '552cc7596c295452c208713bf5fa3c75d826f189' -- 'skills/what-an-email-reveals' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/what-an-email-reveals' ~/.agents/skills/'what-an-email-reveals' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'what-an-email-reveals' ~/.claude/skills/'what-an-email-reveals' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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