MailSlurp guide agent setup

Title: How Does Email Work? From SMTP Submission to Inbox Retrieval
Description: Learn how email works step by step, from application submit and MX routing to inbox retrieval, spam filtering, and delivery monitoring.
Canonical URL: https://www.mailslurp.com/guides/how-does-email-work/
Markdown URL: https://www.mailslurp.com/guides/how-does-email-work.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.