MailSlurp guide agent setup

Title: How to Preview Resend Emails on Phones and Desktop Clients
Description: Preview your delivered Resend email in Gmail, iPhone Mail and Outlook. Follow the API walkthrough with a downloadable example or your own populated template.
Canonical URL: https://www.mailslurp.com/guides/resend-device-rendering/
Markdown URL: https://www.mailslurp.com/guides/resend-device-rendering.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.