📄WHOIS
Key-Systems GmbH · registered 15 years ago · ⚠ expires in 0 days
🌐DNS
1 A · 2 MX · 4 NS · 1 PTR · 1 SOA
🔒SSL/TLS
Let's Encrypt · TLSv1.3 · expires in 78d · 2 SANs
✉️Email Auth
SPF ✗ · DKIM ✗ · DMARC ✗
🔐DNSSEC
signed but validation failed
💻Tech Stack
Host: Hostnet B.V. · Email: Self-hosted · nginx
📡HTTP
1 redirect → 200 · HSTS ✗ · CSP ✗ · X-Frame ✗ · Nosniff ✗
🛡️Security
C (130/215) · 2 critical · 2 high
📈Deliverability
B (70/90) · 2 MX · 5 IPs · 3 issue(s)
🔍Subdomains
wildcard DNS — every guessed name resolves