# Page Not Found

The URL `email-deliverability/email-authentication-and-sending-structure/understanding-email-authentication-spf-dkim-dmarc-and-bimi` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Email Authentication (SPF, DKIM, DMARC & BIMI)](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/email-authentication-spf-dkim-dmarc-and-bimi.md)
- [Sending IP Configuration and Selection](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-ip-configuration-and-selection.md)
- [Email Authentication & Sending Structure](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure.md)
- [Sending Infrastructure Best Practices](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-infrastructure-best-practices.md)
- [Sending Subdomain Setup & Troubleshooting](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-subdomain-setup-and-troubleshooting.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/email-authentication-spf-dkim-dmarc-and-bimi.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.

### Option 2 — Browse the documentation index

Full index: https://doc.batch.com/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://doc.batch.com/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/email-authentication-spf-dkim-dmarc-and-bimi.md`).

You may also use `Accept: text/markdown` header for content negotiation.