📄WHOIS
Key-Systems GmbH · registered 24 years ago · expires 4/10/2027
🌐DNS
1 A · 4 MX · 3 NS · 1 SOA · 10 TXT
🔒SSL/TLS
DigiCert Inc · TLSv1.3 · expires in 127d · 6 SANs
✉️Email Auth
SPF ✓ · DKIM ✗ · DMARC ✓ (p=quarantine)
🔐DNSSEC
signed · valid chain of trust
💻Tech Stack
Host: Letiste Praha, a. s. · Email: Self-hosted
📡HTTP
2 redirect → 200 · HSTS ✓ · CSP ✓ · X-Frame ✓ · Nosniff ✗
🛡️Security
C (150/215) · 1 critical · 2 high
📈Deliverability
A (78/90) · 4 MX · 2 IPs · 5 issue(s)
🔍Subdomains
5 found · 112 answered — autodiscover, ftp, m, www, www2