# Notes from building the infrastructure.

> Notes on cold email infrastructure, deliverability, and building an agent-first sending platform.

Canonical URL: https://outreachstack.com/blog/

## Posts

- **[Why we built our own domain lake instead of renting one](https://outreachstack.com/blog/own-your-domain-data/)** — 2026-06-02 — Every cold email tool sells access to the same rented contact database. We built a 343M-domain lake instead, and that changes what an ICP can be. Markdown: https://outreachstack.com/blog/own-your-domain-data/index.md