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Show HN: I built a free email security checker for small businesses

https://shielddeskhq.com/checker

1•minhajulmahib•1h ago

A free tool that checks SPF, DMARC, DKIM, SSL and MX records for any business domain in 30 seconds. No backend — just HTML and Google's DNS-over-HTTPS API.

Built because 7 in 10 small businesses fail basic email security checks and have no idea.

Comments

stackscope•10m ago

hey, congrats on the launch, your own tool is flagging shielddeskhq.com at 35, worth a quick fix.

Fast Attention for Short Sequences

https://blog.qwertyforce.dev/posts/fast_attention_for_short_sequences

1•qwertyforce•4m ago•0 comments

The Glass_V1 standard for new computational storage

https://github.com/argoscollective/Glass-V1-Standard

1•Argoscollective•5m ago•0 comments

Over the Past Decade, Congestive Heart Failure Increased by over 10%

https://www.scai.org/media-center/news-and-articles/over-past-decade-congestive-heart-failure-and...

1•geox•5m ago•0 comments

Vibe Designing

https://jonathannen.com/vibe-designing/

1•speckx•7m ago•0 comments

Some data on the shape of the forgetting curve

https://www.natemeyvis.com/some-data-on-the-shape-of-the-forgetting-curve/

1•ingve•8m ago•0 comments

Show HN: Outworx Docs – Hosted API docs with an MCP server per project

https://docs.outworx.io

1•aemadeldin•10m ago•0 comments

Software Piracy Statistics – 2026 Outlook

https://www.revenera.com/blog/software-monetization/software-piracy-stat-watch/

1•keepamovin•11m ago•0 comments

From car and phone to tractors, populist wave to end 'captive' repair economy

https://www.cnbc.com/2026/04/25/right-to-repair-consumer-prices-affordability-economy-elections.html

2•1vuio0pswjnm7•11m ago•0 comments

The Fermi Paradox Is Nerdslop

https://monismos.substack.com/p/the-fermi-paradox-is-nerdslop

1•eatitraw•16m ago•0 comments

New study bridges the worlds of classical and quantum physics

https://news.mit.edu/2026/new-study-bridges-classical-and-quantum-physics-0421

1•leephillips•17m ago•0 comments

21-year-old Polish Woman Fixed a 20-year-old Linux Bug

https://itsfoss.com/news/kamila-enlightenment-e16-bug/

1•tempodox•18m ago•1 comments

Tuta: FOSS email service with privacy, encrypt emails, contacts and calendar

https://github.com/tutao/tutanota

1•maxloh•18m ago•0 comments

Command Line Argument Parser with C++26 reflection

https://github.com/nathan-baggs/clap

2•dalvrosa•18m ago•0 comments

The Fermi Paradox (2014)

https://waitbutwhy.com/2014/05/fermi-paradox.html

1•simonebrunozzi•18m ago•0 comments

AI Adoption in the United States and Its (Tiny) Labor Market Impact

https://macromostly.substack.com/p/an-update-on-ai-adoption-in-the-united

1•m-hodges•19m ago•1 comments

History and Los Alamos (2003)

https://sgp.fas.org/eprint/meade.html

1•simonebrunozzi•21m ago•0 comments

Someone recreated StumbleUpon but for Startup landing pages

https://buildhop.io

1•jacobcounsell•24m ago•0 comments

AI News Aggregator – The Wire

https://www.thewire.ink/

1•nmilodev•27m ago•1 comments

GloVe Galaxy Explorer

https://glove.theory-a.com

2•notShabu•30m ago•0 comments

Local-Run Graph-Based Scalable AGI

https://boggersthefish.com/

1•explaingarlic•31m ago•1 comments

Survival Is the Only Success

https://ofdollarsanddata.com/survival-is-the-only-success/

1•speckx•36m ago•0 comments

Is "Outsourcing Our Thinking to AI" a Bug or a Feature?

https://slashdot.org/submission/17346722/is-outsourcing-our-thinking-to-ai-a-bug-or-a-feature

1•theodpHN•37m ago•0 comments

DeepSeek V4 in vLLM: Efficient Long-Context Attention

https://vllm-website-pdzeaspbm-inferact-inc.vercel.app/blog/deepseek-v4

1•Palmik•38m ago•0 comments

Show HN: I got tired of boring SQL tutorials, so I built a game

https://sqlprotocol.com

1•ItaiZeilig•38m ago•2 comments

Multi-player agents don't fit in the sandbox

https://www.mendral.com/blog/multi-player-agents-sandbox

1•shad42•39m ago•0 comments

Show HN: Duckville, a persistent-world life SIM where you're a duck

https://duckville.town

1•stfurkan•39m ago•0 comments

GPT hallucinated a bug in my code, so I 'fixed' it

https://www.droppedasbaby.com/posts/2602-02/

1•offbyone42•40m ago•0 comments

UK to permanently ban future generations from buying cigarettes

https://nypost.com/2026/04/21/world-news/uk-to-permanently-ban-future-generations-from-buying-cig...

10•ivewonyoung•41m ago•6 comments

How People Smuggle the Internet Through DNS [video]

https://www.youtube.com/watch?v=Bnir1IQAPPE

2•hexomancer•42m ago•0 comments

Claude Code Tips I Wish I'd Had from Day One

https://marmelab.com/blog/2026/04/24/claude-code-tips-i-wish-id-had-from-day-one.html

2•adunk•44m ago•0 comments