🌐DNS
1 A · 4 MX · 3 NS · 2 CAA · 1 PTR · 1 SOA · 3 TXT · 1 AAAA
🔒SSL/TLS
Let's Encrypt · TLSv1.3 · expires in 48d · 2 SANs
✉️Email Auth
SPF ✓ · DKIM ✗ · DMARC ✓ (p=reject)
💻Tech Stack
Host: 23M GmbH · Email: Self-hosted · nginx
📡HTTP
2 redirect → 200 · HSTS ✓ · CSP ✓ · X-Frame ✓ · Nosniff ✓
🛡️Security
B (175/215) · 1 critical · 1 high
⚠️Threats
risk: low · 1 recommendation(s)
📈Deliverability
A (82/90) · 4 MX · 8 IPs · 4 issue(s)
🔍Subdomains
3 found · 112 answered — m, status, www