MailSlurp guide agent setup

Title: Email Security Guide: DKIM, SPF, and DMARC Working Together
Description: A practical implementation guide for DKIM, SPF, and DMARC with rollout phases, common misconfigurations, and monitoring workflows.
Canonical URL: https://www.mailslurp.com/guides/email-security-dkim-spf-and-dmarc/
Markdown URL: https://www.mailslurp.com/guides/email-security-dkim-spf-and-dmarc.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.