MailSlurp guide agent setup

Title: How to Whitelist an Email in Gmail, Outlook, and Office 365
Description: Learn how to whitelist an email in Gmail, Outlook, and Office 365, what safe-sender rules actually do, and why allowlisting does not replace sender authentication.
Canonical URL: https://www.mailslurp.com/guides/whitelist-an-email/
Markdown URL: https://www.mailslurp.com/guides/whitelist-an-email.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.