Email Deliverability Toolkit
9 free tools to keep your email out of spam
What it does
Nine free tools covering the DNS your deliverability depends on: SPF, DKIM, and DMARC checkers that grade your config (and generators that build the fix), plus DNS, blacklist, and full deliverability checks. No signup, no metering. From the Truelist team.
Comprehensive collection of free email and DNS tools. Check SPF, DMARC, DKIM records, analyze deliverability, verify domains, and generate authentication records. Improve your email reputation and security instantly.
Validate your SPF records and check email authentication setup to prevent spoofing and improve deliverability. Analyze your DMARC policy configuration and get recommendations to protect your domain from email spoofing. Verify DKIM signatures and discover common selectors to ensure proper email authentication. Get a comprehensive deliverability score based on SPF, DMARC, and MX record analysis. Check your subject line and email content for spam trigger words, formatting issues, and deliverability risks. Analyze email bounce rates and get insights into delivery issues and list health. Check your domain's reputation including blacklist status, authentication setup, and infrastructure health.…from truelist.io
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Email Deliverability API & Checker26d ago · web-production-80c77.up.railway.app · ▲2Instantly audit SPF, DKIM & DMARC to stop landing in spam.



More growth this month
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AstraPixels▲267A pixel-art solar system at its real current positions.
Growth · 29d ago · astrapixels.com

Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com