🌐DNS
1 A · 1 MX · 3 NS · 1 PTR · 1 SOA · 5 TXT · 1 AAAA
🔒SSL/TLS
ZeroSSL GmbH · TLSv1.3 · expires in 37d · 2 SANs
✉️Email Auth
SPF ✓ · DKIM ✓ · DMARC ✓ (p=quarantine)
💻Tech Stack
Host: Johannes Gutenberg-Universitaet Mainz · Email: Self-hosted · nginx
📡HTTP
2 redirect → 200 · HSTS ✓ · CSP ✗ · X-Frame ✗ · Nosniff ✗
🛡️Security
B (160/215) · 1 critical · 2 high
📈Deliverability
A (94/100) · 1 MX · 2 IPs · 2 issue(s)
🔍Subdomains
9 found · 96 answered (16 timed out) — autoconfig, ftp, imap, mail, mx, pop +3 more
📚Web Archive
first snapshot 1998-01-26 · 28y archived