Domain Overview
DNS: ✓ 14d ago
Checker: ✓ 14d ago
fibringlue.net
Disposable
✓ Yes
Unknown
⚠ Yes
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-29 14:47:40 UTC · ↺ Refresh
MX Hostnames
- custmx.cscdns.net
MX Priorities
- custmx.cscdns.net: 10
A / AAAA Records
- 165.160.13.20 (no PTR)
- 165.160.15.20 (no PTR)
Mail Server IPs
- 198.58.121.58 ↩ 198-58-121-58.ip.linodeusercontent.com
SOA Record
Raw SOA
dns1.cscdns.net hostmaster.cscdns.net 2020041604 28800 7200 604800 14400
Primary NS (mname)
dns1.cscdns.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2020041604
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
14400s
Nameservers (NS)
dns1.cscdns.net
dns2.cscdns.net
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; pct=100; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 -all
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