Site is OK? is a website infrastructure health checker. It scans a domain for common issues across HTTP, HTTPS, SSL certificates, DNS, email configuration (SPF, DMARC, DKIM, MTA-STS, TLS-RPT), mail server blacklist reputation, domain registration, and security headers — then reports a score out of 100 with prioritized recommendations.
Anyone can run a one-off standard check for free, without an account. A free account lets you save domains to a dashboard, monitor them over time with automated daily checks and uptime monitoring, and receive email alerts when something breaks. Paid plans add more domains, change history, and weekly email reports.
Visit the Site is OK page for more details.