🌐DNS
1 A · 2 MX · 3 NS · 1 PTR · 1 SOA · 5 TXT
🔒SSL/TLS
Hellenic Academic and Research Institutions CA · TLSv1.3 · expires in 156d · 3 SANs
✉️Email Auth
SPF ✓ · DKIM ✗ · DMARC ✗
💻Tech Stack
Host: Johann Wolfgang Goethe-Universitat Frankfurt am Main · Email: Self-hosted
📡HTTP
4 redirect → 200 · HSTS ✓ · CSP ✗ · X-Frame ✗ · Nosniff ✗
🛡️Security
B (160/225) · 1 critical · 3 high
📈Deliverability
B (80/100) · 2 MX · 2 IPs · 2 issue(s)
🔍Subdomains
8 found · 113 answered — m, mail, mx, mx1, mx2, webmail +2 more