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

#1

Post by minhajulmahib » Sat, Apr 25, 2026, 1:41 PM UTC

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.

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

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

#2

Post by mastermanas1234 » Sat, Apr 25, 2026, 2:13 PM UTC

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

#3

Post by datafreak_ » Sat, Apr 25, 2026, 3:30 PM UTC

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

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

#4

Post by sds357 » Sat, Apr 25, 2026, 4:24 PM UTC

Security report for shielddeskhq.com 43 Security Score / 100 Vulnerable — Your domain can be spoofed.

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

#5

Post by minhajulmahib » Sat, Apr 25, 2026, 6:48 PM UTC

sds357 wrote: post #4

Security report for shielddeskhq.com 43 Security Score / 100 Vulnerable — Your domain can be spoofed.

Good catch — embarrassing that my own domain scores 43 on my tool. Fixing the DNS records now. Thanks for actually testing it.

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

#6

Post by minhajulmahib » Sat, Apr 25, 2026, 6:49 PM UTC

datafreak_ wrote: post #3

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

You're right — fixing it now. SPF and DMARC records need updating on my end. Appreciate you scanning it

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

#7

Post by mohamed_azeem » Mon, Apr 27, 2026, 5:03 AM UTC

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