NitWings
NitWings Insights

Technical Insights

Practical field notes for teams diagnosing email deliverability, DNS authentication, sender reputation, Linux, MTA, cloud, monitoring, and DevOps failures.

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Technical knowledge system connecting email identity, secure mail flow, servers, cloud operations, monitoring, and runbooks
182 Published articles
10 Topic tracks
Operator-grade notes Focus
Technical notes

Articles on email deliverability, DNS, Linux, MTA operations, DevOps, monitoring, and incident recovery.

Built for operators

Short, practical guidance for teams that need to diagnose, repair, and run production email systems.

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Browse by issue, provider, workflow, or stack area when you need a fast starting point for investigation.

A modular email message moving through desktop and mobile previews, accessibility and link checks, responsive rendering validation, and final deliveryContent, Design & Testing · Dec 10, 2020 · 34 min read

Build an Awesome Email: A Production-Ready Guide

Build clear, accessible, responsive email with clean code, controlled size, clipping prevention, safe links, and testing across real webmail and mobile clients.

A Linux server security workflow moves from inventory and surface discovery through configuration review, risk ranking, controlled hardening, verification, centralized audit logging, and rollbackLinux, MTA & Security · Dec 10, 2020 · 25 min read

Linux Security Audit and Hardening: Production Guide

Audit and harden Linux through evidence collection, service and identity review, SSH, patching, auditd, permissions, SELinux or AppArmor, firewall controls, verification, and rollback.