Engineering notes
Articles for people who
ship the stack
Rewrites on React, Node.js, TypeScript and AI. A translated body is shown when it exists. If it does not, you see the English text and a note that says so.
Tagged: DNS
Audit SPF DKIM and DMARC from Node.js with prioritized findings
Run an SPF, DKIM and DMARC security audit from Node.js, pass DKIM selectors the right way, and turn the scores into a repair plan ordered by real impact.
5 min readFrom Address Bar to Pixels: How a Browser Loads a Web Page
A beginner-friendly walk through DNS lookup, the HTTP request and response, and how the browser turns HTML, CSS and JavaScript into the page you see on screen.
5 min readBlocking Undeliverable Sign-Up Emails with a Supabase Auth Hook and DNS
Use a Supabase before-user-created hook and MX, A and AAAA lookups to reject sign-ups whose email domain cannot receive mail, following the rules in RFC 5321.
7 min read
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About these articles
Yes. Each piece is an original English rewrite prepared for this site. Structure and code examples follow the source material; prose is rewritten and checked for overlap before export.
English is the source. Another language is shown only when that translation body exists. A missing or empty translation stays in English, including on a localized URL.
New drafts land in the publish queue as they pass editorial checks. Running the site import picks up only new or changed slugs — nothing is duplicated.
Treat samples as illustrative. Validate against your stack and licences before production use. For delivery work, contact us with the brief.
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