MailSlurp guide agent setup

Title: Why Your Campaign Emails Go to Junk in Outlook
Description: Diagnose Outlook junk placement by separating Outlook.com, Microsoft 365 policy, authentication, sender reputation and mailbox rules.
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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.