minhajulmahib
- Karma
- 0
- Created
- ()
- Submissions
- 0
- Show HN: I built a free email security checker for small businesses (shielddeskhq.com)
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…