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Email OSINT (High Level)
| Approach | Notes |
|---|---|
| Holehe | Open-source check of public “account exists” signals — weak, can be stale |
| Epieos | Consolidated lookups — respect site terms |
| Hunter.io | Organizational pattern discovery — commercial limits |
Breach databases
Have I Been Pwned and similar: use to explain credential reuse risk or to support reported journalism about breach exposure — not to shame private individuals.
Hard rule
Never encourage password reuse testing or credential stuffing.
Related skill
osint-identity-researcher