MailSlurp guide agent setup Title: Email tracking pixels Description: Email Open Tracking with MailSlurp: Send tracking pixels to see if emails are opened, and receive open events via webhook or dashboard view. Canonical URL: https://www.mailslurp.com/guides/email-tracking-pixels/ Markdown URL: https://www.mailslurp.com/guides/email-tracking-pixels.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.