MailSlurp guide agent setup

Title: Email Protocols Explained: SMTP, IMAP, POP3, and Where APIs Fit
Description: Learn the main email protocols, what SMTP, IMAP, and POP3 each do, and how to choose the right send, receive, and sync model for apps, support, QA, and product email.
Canonical URL: https://www.mailslurp.com/guides/email-protocols/
Markdown URL: https://www.mailslurp.com/guides/email-protocols.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.