MailSlurp guide agent setup

Title: Your Email Background Disappeared: Keep the Message Readable
Description: See how one email background changes in Outlook and Gmail, then choose a solid-color fallback or foreground image that preserves the campaign's offer.
Canonical URL: https://www.mailslurp.com/guides/email-background-image-fallbacks/
Markdown URL: https://www.mailslurp.com/guides/email-background-image-fallbacks.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.