> 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/harden-your-environment/email-authentication/what-is-spf-and-how-do-i-configure-it.md).

# What is SPF and how do I configure it?

## SPF definition

Sender Policy Framework (SPF) is an email security protocol used to combat spam and email spoofing.

Specifically, SPF allows a domain (e.g., yoursite.com) to specify in its DNS records which servers are authorized to send emails on its behalf. When a mail server receives an email claiming to come from yoursite.com, it checks if the sending server is on this authorized list.

For example, if you use Gmail or a service like Mailchimp to send your emails, your SPF record will say: "Only Gmail or Mailchimp servers can send emails on behalf of my domain."

## Configuration

Go to `External Scan` > `Results` > `Configuration and reputation` to find your SPF data.

<figure><img src="https://1646911190-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>

Then click on `View all` at the bottom of the page: you will find misconfigured domains, as well as installation guides depending on whether you are using Google or Microsoft.


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