NitWings Insights
Technical Insights
Practical field notes for teams diagnosing email deliverability, DNS authentication, sender reputation, Linux, MTA, cloud, monitoring, and DevOps failures.
Articles on email deliverability, DNS, Linux, MTA operations, DevOps, monitoring, and incident recovery.
Short, practical guidance for teams that need to diagnose, repair, and run production email systems.
Browse by issue, provider, workflow, or stack area when you need a fast starting point for investigation.
Email Deliverability · Sep 26, 2018 · 12 min readMTA-STS and TLS-RPT in 2018: Enforceable Transport Security and Reporting
An expert implementation and troubleshooting guide to the September 2018 MTA-STS and SMTP TLS Reporting standards for secure mail transport.
Email Deliverability · Jun 23, 2018 · 11 min readYahoo and AOL Unified on OATH Mail Infrastructure in 2018
An expert operational history of the Yahoo and AOL OATH consolidation, including shared MTAs, reporting transitions, reputation analysis and current controls.
Email Deliverability · Apr 25, 2018 · 11 min readGmail Unsubscribe Recommendations in 2018: Frequency and Engagement Pressure
A technical history of Gmail unsubscribe suggestions and a current operating guide for permission, frequency, one-click processing and measurement.
Email Deliverability · Mar 28, 2018 · 11 min readYahoo BIMI Pilot in 2018: Early Provider-Controlled Brand Identity
A technical history of Yahoo’s first BIMI pilot and a current implementation guide covering DMARC, SVG, DNS, certificates, reputation and display limits.
Email Deliverability · Mar 22, 2018 · 11 min readYahoo Mail Image Proxy in 2018: Measurement and Dynamic-Content Effects
A technical guide to Yahoo’s 2018 secure image proxy, its effect on origin logs, open interpretation, dynamic content, privacy and current operations.
Email Deliverability · Feb 21, 2018 · 11 min readAOL Feedback and DMARC Reporting Moved to Yahoo in 2018
A technical guide to the 2018 AOL-to-Yahoo reporting transition, including MX-linked DMARC reports, mailbox-linked complaints and current CFL operations.
Email Deliverability · Jan 25, 2018 · 12 min readAOL and Yahoo MX Consolidation in 2018: The First Infrastructure Transition
A staged technical history of the AOL-to-Yahoo MX transition, including pass-through routing, feedback ownership, MTA controls and modern diagnosis.
Email Deliverability · Jan 23, 2017 · 12 min readRFC 8058 One-Click Unsubscribe in 2017: The Standard Behind Modern Requirements
An operator-focused guide to the 2017 RFC 8058 standard, its security model, exact message headers, POST workflow and modern provider requirements.
Email Deliverability · Oct 28, 2016 · 13 min readOutlook Focused and Other Inbox in 2016: A New Visibility Layer
A technical history and operating guide to Outlook Focused and Other classification, user training, visibility measurement and deliverability diagnosis.