Hey Product Hunt! 👋 After my newsletter records broke silently, I built InboxOK: a daily background watchdog for email domain infrastructure. What it does: • Auto-checks SPF/DKIM/DMARC & 14 blacklists daily. • Emails exact DNS fixes within 6 hours of a change. • Built solo using Claude Code + Deepseek on FastAPI, Next.js & Railway. Flat pricing (1/5/10/50 domains). Free tier included. Live at inboxok.com. Love your technical feedback!