What if your authoritative DNS server *was* a Git repository?
DNS has no git . I built one. This is a working prototype, not a finished product. The point of the post is to show that a long-standing gap in how DN…
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DNS Made Simple: What Really Happens Before Your Browser Opens a Website
We use domain names every day. We type google.com , facebook.com , or linkedin.com into a browser, press Enter, and the website opens in seconds. It f…
I Ran a Subdomain Takeover Checker on GitHub.com and Found a Vulnerable Subdomain
I've been building a tool that checks subdomains for takeover vulnerabilities. Yesterday I decided to test it on a well-known target — github.com — ju…
Your Emails Go to Spam Because of Three DNS Records You Never Set Up
As a fractional CTO working with startups in the B4i program, I've seen the same email delivery problem show up over and over. The app was fine. The e…
Why Your Lab Domain Suddenly Stopped Resolving (DNS Blocklists)
You wake up, grab coffee, and nothing works. Grafana won't load. Your reverse proxy is throwing 502s. SSH to your machines by hostname? Nope. But ping…
Custom Domains for Next.js: The Cloudflare + Vercel Setup That Works in 2026
You shipped a Next.js app to Vercel. It's live at your-project-xxx.vercel.app\ . Everything works, but the URL looks like a throwaway demo. Getting a …
DNS Propagation Explained: Why Your New Website Looks Broken (And How to Check It)
So you just bought a domain, pointed it to your hosting, and... nothing. Blank page. "This site can't be reached." You check with your friend in anoth…
SPF Records Explained: Prevent Email Spoofing with Sender Policy Framework
TL;DR SPF (Sender Policy Framework) is the first line of defense against email spoofing, allowing domain owners to declare which IP addresses and serv…
DKIM Explained: How Email Digital Signatures Protect Your Domain
TL;DR DKIM (DomainKeys Identified Mail) adds a cryptographic signature to every outgoing email, allowing recipients to verify that the message was aut…
BIMI: Display Your Brand Logo in Email Inboxes
TL;DR BIMI (Brand Indicators for Message Identification) is the final layer in the email authentication stack, allowing organizations to display their…
DNS Records: The Complete Reference Guide for Every Record Type
TL;DR DNS (Domain Name System) translates human-readable domain names into IP addresses and service endpoints. With over 1.1 trillion DNS queries hand…
DNS Propagation: How Long Does It Really Take? (With Technical Explanation)
TL;DR DNS propagation — the time it takes for DNS changes to reach every resolver worldwide — is one of the most misunderstood concepts in web operati…
Email Deliverability: How to Improve Inbox Placement in 2026
TL;DR Email deliverability determines whether your messages reach the inbox, land in spam, or get rejected entirely. With Google and Yahoo enforcing s…