Introduction
Haltman.io is an open-source initiative focused on cybersecurity and privacy tooling. Explore our knowledge base covering OSINT tools, mail forwarding, and self-hosting guides.
Overview
Welcome to the Haltman.io knowledge base. Our goal is to document our open-source projects accurately and preserve this knowledge as practical, technical reference material.
What you will find here:
- Open-source OSINT tools — CLI tools written in Go for DNS intelligence, breach exposure, reverse WHOIS, subdomain discovery, and search automation.
- Free Mail Forwarding Service — A public, abuse-aware mail forwarding service at forward.haltman.io, with user guides and full self-hosting documentation.
- Self-hosting guides — Complete stack documentation (Postfix, MariaDB, PostSRSd, OpenDKIM, Node.js API, Next.js UI) so you can run everything on your own infrastructure.
Open Source Tools
OSINT and reconnaissance CLI tools for security professionals. All written in Go, no API keys required for most.
Mail Forwarding
Free mail forwarding service. Create aliases, add your own domains, and manage everything via UI or cURL.
Self-Hosting
Full self-hosting documentation for the mail forwarding stack. Deploy on your own VPS with complete control.
Projects
All tools are written in Go 1.22+, designed for speed, explicit control, and pipeline-friendly output.
| Tool | Description |
|---|---|
| ip-thc | Reverse DNS, subdomain, and CNAME lookups via ip.thc.org (5.14B+ domains) |
| search-leaks | Credential exposure statistics via Hudson Rock OSINT |
| reverse-whois | Reverse WHOIS enumeration via WhoisXML API |
| sub-alter | Domain/subdomain discovery with wildcard pattern filters |
| brave-search | URL extraction from Brave Search API results |
A complete, free, public mail forwarding service with abuse protection and email confirmation.
| Component | Description |
|---|---|
| mail-forwarding-core | Postfix + MariaDB + PostSRSd + OpenDKIM |
| mail-forwarding-api | Node.js/Express API for alias management |
| mail-forwarding-ui | Next.js frontend for end users |
Links
Browse the sidebar to explore specific sections, or start with the Quickstart for a guided overview.
Last updated today