Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cssf.lu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 04:56:06 UTC · ↺ Refresh
MX Hostnames
- mail.cssf.lu
MX Priorities
- mail.cssf.lu: 10
A / AAAA Records
- 212.66.76.50 (no PTR)
- 146.0.177.242 (no PTR)
Mail Server IPs
- 146.0.177.233 ↩ mail.cssf.lu
- 212.66.76.41 ↩ mail.cssf.lu
SOA Record
Raw SOA
dns01.cssf.lu dns.cssf.lu 2025121101 43200 60 604800 3600
Primary NS (mname)
dns01.cssf.lu
Admin Email (rname)
dns@cssf.lu
Serial
2025121101
Refresh
43200s
Retry
60s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns01.cssf.lu
dns02.cssf.lu
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:212.66.76.41 ip4:146.0.177.233 ip4:212.66.76.45 ip4:146.0.177.237 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; adkim=s; aspf=r; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- cisco-ci-domain-verification=15f76906eed6d7d129dff55d27129bf6bd0d57fda755eabb6fd828882ed9782b
- SPFv=spf1 mx ip4:212.66.76.41 ip4:146.0.177.233 ip4:212.66.76.45 ip4:146.0.177.237 -all
- MS=1D732CA2EA5C1B552F604AEB0F8FD0C94BB0E5A0
- barco-verification=8ecf72dd-a5c7-561a-9d34-57738deea74c
- apple-domain-verification=eLdYnSD1E3BGOIqB
- google-site-verification=qDR4KauoPqlpTowAejpvG-TqU56ftDXw21CeogzpihI
Full email verification for cssf.lu
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