📄WHOIS
Key-Systems GmbH · registered 31 years ago · expires 4/24/2030
🌐DNS
1 A · 8 MX · 4 NS · 1 PTR · 1 SOA · 1 TXT
🔒SSL/TLS
Let's Encrypt · TLSv1.3 · expires in 38d · 2 SANs
✉️Email Auth
SPF ✓ · DKIM ✗ · DMARC ✓ (p=reject)
🔐DNSSEC
signed · valid chain of trust
💻Tech Stack
Host: Amazon Web Services · Email: Google Workspace · nginx
📡HTTP
1 redirect → 200 · HSTS ✗ · CSP ✗ · X-Frame ✗ · Nosniff ✗
🛡️Security
C (145/215) · 1 critical · 2 high
📈Deliverability
A (80/90) · 8 MX · 14 IPs · 4 issue(s)
🔍Subdomains
3 found · 112 answered — sso, www, www2