📄WHOIS
Universiteit van Amsterdam · registered 37 years ago
🌐DNS
2 A · 1 MX · 4 NS · 4 CAA · 2 PTR · 1 SOA · 15 TXT
🔒SSL/TLS
Sectigo Limited · TLSv1.3 · ⚠ 21d left · 18 SANs
✉️Email Auth
SPF ✓ · DKIM ✓ · DMARC ✓ (p=reject)
🔐DNSSEC
signed · valid chain of trust
💻Tech Stack
Host: Amazon Web Services · Email: Self-hosted · Apache
📡HTTP
2 redirect → 200 · HSTS ✓ · CSP ✗ · X-Frame ✓ · Nosniff ✗
🛡️Security
B (170/215) · 1 critical · 1 high
📈Deliverability
A+ (96/100) · 1 MX · 8 IPs · 1 issue(s)
🔍Subdomains
5 found · 111 answered (1 timed out) — autodiscover, cdn, smtp, static, www