# SPF Missing Flag

Sender Policy Framework

It is used to allow server to send mail on behalf of domain.

SPF TX Record  is like a DNS record

But what if a domain wont have any SPF record. Any server can send mail on behalf of the domain.

STEPS to check a domain have SPF or Not:

1. Go to [http://kitterman.com/spf/validate.html](https://kitterman.com/spf/validate.html)
2. Enter your domain there without http / https / www , because its a domain based search.
3. If there is missing SPF record, then send mail via <https://emkei.cz/>

Prevention:

* Correct the SPF entry.&#x20;


---

# Agent Instructions: Querying This Documentation

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

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://modi-arun91.gitbook.io/penetration-testing/web-application-vulnerabilities/spf-missing-flag.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.
