Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kfo-os.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 02:54:13 UTC · ↺ Refresh
MX Hostnames
- kfo-os.de
MX Priorities
- kfo-os.de: 0
A / AAAA Records
- 95.216.27.57 ↩ nettbiz-server.http-s.de
- 2a01:4f9:2a:1b46::2 ↩ nettbiz-server.http-s.de
Mail Server IPs
- 95.216.27.57 ↩ nettbiz-server.http-s.de
- 2a01:4f9:2a:1b46::2 ↩ nettbiz-server.http-s.de
SOA Record
Raw SOA
ns2.fair4dns.de info.nettbiz.de 2021061410 10800 3600 604800 86400
Primary NS (mname)
ns2.fair4dns.de
Admin Email (rname)
info@nettbiz.de
Serial
2021061410
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns1.fair4dns.de
ns2.fair4dns.de
SPF Record
✓ Strict (-all)
v=spf1 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx -all
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