Why DMARC Alignment Matters More Than DMARC Itself
DMARC fails when SPF or DKIM pass for the wrong domain. The alignment rules, relaxed vs strict modes, and the ESP configuration that fixes it.
Infrastructure
Understand the infrastructure behind global communication networks, including telecom architecture, messaging APIs, routing systems, push notification services, CPaaS platforms, cloud communication systems, and real-time messaging technologies.
One-Click Unsubscribe (RFC 8058): Implementation Pitfalls Most Senders Miss
RFC 8058 one-click unsubscribe is mandatory for bulk senders. The five implementation mistakes that fail compliance and how to test your endpoint properly.
The ARC Header: How Forwarding Breaks DMARC and What You Can Do
Forwarders break DMARC by modifying messages in transit. ARC (RFC 8617) preserves authentication results across hops. How it works, who supports it, and the limits.
Why Your Transactional Emails Are Landing in Spam (And Mixing Them with Marketing Is the Reason)
Password resets going to spam? You're sending them from the same IP and domain as marketing campaigns. The four operational fixes that actually work.
IP Warming in 2023: A 30-Day Schedule That Actually Works
Most IP warming schedules fail because they ignore engagement segmentation. The 30-day ramp that actually works volume tables, segment ordering, and recovery rules.