> For the complete documentation index, see [llms.txt](https://docs.stoik.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stoik.io/cyber-best-practices/es/refuerza-tu-entorno/email-authentication/what-is-spf-and-how-do-i-configure-it.md).

# ¿Qué es SPF y cómo lo configuro?

## Definición de SPF

Sender Policy Framework (SPF) es un protocolo de seguridad del correo electrónico utilizado para combatir el spam y la suplantación de correo electrónico.

Específicamente, SPF permite que un dominio (por ejemplo, yoursite.com) especifique en sus registros DNS qué servidores están autorizados para enviar correos electrónicos en su nombre. Cuando un servidor de correo recibe un correo que dice provenir de yoursite.com, comprueba si el servidor de envío está en esta lista autorizada.

Por ejemplo, si usas Gmail o un servicio como Mailchimp para enviar tus correos electrónicos, tu registro SPF dirá: "Solo los servidores de Gmail o Mailchimp pueden enviar correos electrónicos en nombre de mi dominio."

## Configuración

Ve a `Escaneo externo` > `Resultados` > `Configuración y reputación` para encontrar tus datos SPF.

<figure><img src="https://2709143968-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjlP9dfgnu6hj9gyZJG1g%2Fuploads%2Fgit-blob-8a4cbaea6da05b2d912244ea3e63dd8a70a776bf%2FScreenshot%202025-12-30%20at%2017.47.57.png?alt=media" alt=""><figcaption></figcaption></figure>

Luego haz clic en `Ver todo` en la parte inferior de la página: encontrarás dominios mal configurados, así como guías de instalación según si estás usando Google o Microsoft.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.stoik.io/cyber-best-practices/es/refuerza-tu-entorno/email-authentication/what-is-spf-and-how-do-i-configure-it.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.