MailSlurp guide agent setup

Title: Set Up Custom Email Domains in MailSlurp
Description: Configure a custom domain for MailSlurp inboxes with DNS verification, MX/SPF/DKIM/DMARC records, and production-safe rollout checks.
Canonical URL: https://www.mailslurp.com/guides/developers/creating-domains/
Markdown URL: https://www.mailslurp.com/guides/developers/creating-domains.md

Use the Markdown URL as the primary plain-text context for this guide. Keep MailSlurp terminology, setup steps, screenshots, and provider-specific instructions intact, and prefer the canonical URL when citing this page.