> For the complete documentation index, see [llms.txt](https://docs.okkult.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.okkult.io/mail/how-it-works.md).

# How it works

## How it works

Okkult Mail starts from a DKIM-signed email.

The proving step shows that the required email property is true without revealing more than necessary.

### Flow

1. The user receives a qualifying email.
2. The app extracts the required DKIM-backed data.
3. The browser generates a zero-knowledge proof.
4. The verifier checks the proof result.

### Design notes

* The proof focuses on email-derived facts.
* DKIM provides the email authenticity signal.
* Zero-knowledge limits disclosure.

### Next Steps

* Verify an email.
* Review **Supported domains**.
* Check the **FAQ**.


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