About

The Email Stack is a reference for the tools that send the world's email, and the DNS records that reveal them. Every check we offer reads from public DNS — we never ask for access to an inbox, and we never send mail on your behalf.

Why we built it

Email infrastructure is scattered across a dozen dashboards and a hundred half-right blog posts. We wanted one place where you could check a domain's authentication, see the stack behind it, and compare the tools on the same terms — without an account, a trial, or a sales call.

How we make money

The tools are free and always will be. In time, the directory may carry clearly-labelled sponsored placements and affiliate links. When it does, we will disclose them inline. A listing is never an endorsement, and no tool can pay to change its authentication results — those come straight from DNS.

Get in touch

Reach us at hello@theemailstack.com.