📄WHOIS
RUCENTER-SU · registered 5 years ago
🌐DNS
1 A · 1 MX · 2 NS · 1 PTR · 1 SOA · 4 TXT
🔒SSL/TLS
Let's Encrypt · TLSv1.3 · ⚠ 17d left · 2 SANs
✉️Email Auth
SPF ✓ · DKIM ✗ · DMARC ✗ (p=none)
💻Tech Stack
Host: Serverius · Email: Self-hosted · nginx
📡HTTP
2 redirect → 200 · HSTS ✓ · CSP ✓ · X-Frame ✓ · Nosniff ✓
🛡️Security
C (145/215) · 1 critical · 2 high
📈Deliverability
A (79/90) · 1 MX · 1 IPs · 4 issue(s)
🔍Subdomains
2 found · 108 answered (4 timed out) — mx, www