# Sending Subdomain Setup & Troubleshooting

- [Sending Subdomain Architecture](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-subdomain-setup-and-troubleshooting/sending-subdomain-architecture.md): Learn how to segment your email traffic across multiple subdomains  to isolate risk and optimize your sender reputation.
- [Setting Up a Sending Subdomain](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-subdomain-setup-and-troubleshooting/setting-up-a-sending-subdomain.md): Get to know how to set up a new sending subdomain with Batch to send your first emails.
- [Troubleshooting Email Authentication Issues](https://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-subdomain-setup-and-troubleshooting/troubleshooting-email-authentication-issues.md): You will find here all the information you need to troubleshoot issues with SPF, DKIM and DMARC.


---

# 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://doc.batch.com/guides-and-best-practices/email-deliverability/email-authentication-and-sending-structure/sending-subdomain-setup-and-troubleshooting.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.