what-an-email-reveals
useosint/osint-skillsInvestigate an email address — MX and syntactic validation, Gravatar lookup, corporate email-format inference, breach exposure, and full mail-header analysis…
Scores out of 100 · grade A
2026-08-22Works
40% of the score100/100
- Loads cleanly: valid frontmatter, required fields present, no dangling references.
Maintained
25% of the score92/100
- no commits in the last 12 weeks
Adopted
20% of the score42/100
- 1,592 installs on skills.sh.
- 21 stars on the source repo.
Documented
15% of the score82/100
- 1,531 words with worked examples.
- Ships 2 bundled files.
Install
npx skills add useosint/osint-skills/what-an-email-revealsWhat it says it does
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. Use for email OSINT, verifying whether an address exists, finding accounts registered to it, guessing a company's email format, or tracing where a suspicious message actually came from. Applies to business email compromise and invoice-fraud investigation, phishing triage, vendor-payment verification, and pre-engagement research. Reference at useosint.com/skills/what-an-email-reveals.
Also in useosint/osint-skills
| Artifact | Score | What the check found | Type | Reach | Last commit |
|---|---|---|---|---|---|
| read-deleted-pagesuseosint/osint-skills | clean | Skill | 1,847 installs | 19 days ago | |
| secrets-in-file-metadatauseosint/osint-skills | clean | Skill | 1,651 installs | 19 days ago | |
| secrets-in-git-historyuseosint/osint-skills | clean | Skill | 1,724 installs | 19 days ago | |
| who-owns-this-domainuseosint/osint-skills | clean | Skill | 1,738 installs | 19 days ago | |
| find-exposed-serversuseosint/osint-skills | clean | Skill | 1,826 installs | 19 days ago | |
| find-hidden-subdomainsuseosint/osint-skills | clean | Skill | 1,587 installs | 19 days ago |
Other productivity skills
Browse all| Artifact | Score | What the check found | Category | Reach | Last commit |
|---|---|---|---|---|---|
| slack-gif-creatoranthropics/skills | No license | Productivity | 63,566 installs | today | |
| lark-eventlarksuite/cli | clean | Productivity | 413,622 installs | today | |
| zoom-apps-sdkanthropics/knowledge-work-plugins | clean | Productivity | 1,638 installs | today | |
| canva-creatoranthropics/knowledge-work-plugins | clean | Productivity | 1,429 installs | today | |
| emailscoreyhaines31/marketingskills | clean | Productivity | 49,703 installs | today | |
| startanthropics/knowledge-work-plugins | clean | Productivity | 4,476 installs | today |
Put this measurement in your README
A badge carrying how many listings this index holds from the repository and how many pass every static structural check. It reads from this index every time somebody loads your page, so it changes when the measurement changes and there is nothing to keep up to date. Free, no account, and the value is not something you or we can set by hand.
[](https://skillworks.kynth.studio/?q=useosint%2Fosint-skills)Would rather not hotlink us? Every badge is also served in shields.io’s endpoint schema, so shields renders the image and your readers never talk to our domain:
Published by Toolproof, the masthead over this index and eight others. The method behind the number is at toolproof.kynth.studio/methodology, and the whole thing is readable as JSON with no key at /api.
