Microsoft Updates & Filtering

Why is Outlook.com / Office 365 so strict? This section explores Microsoft's "corporate security" mindset, their reliance on SNDS (Smart Network Data Services), and their extreme sensitivity to complaints and spam trap hits.

15 questions in this topic

How does Microsoft filter email? What is SmartScreen? How do Microsoft’s consumer filters differ from corporate filters (Exchange Online Protection)? What’s the difference between Junk and Clutter (Focused Inbox)? How does Microsoft interpret engagement? What are SNDS and JMRP, and how do they help? What causes “421 RP-001” and “550 SC-001” errors? How does Microsoft throttle senders differently than Gmail? What’s Microsoft’s reputation decay speed? How does Office365’s security layer affect bulk mailers? What’s the impact of shared vs dedicated IPs at Microsoft? How does Microsoft view subdomain separation? What are Microsoft’s complaint thresholds? How can you appeal Microsoft throttling? How to test and monitor Outlook inbox placement specifically?

Questions about Microsoft Updates & Filtering