Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
krhengstmann.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 03:43:57 UTC · ↺ Refresh
MX Hostnames
- mx1.core-networks.de
- mx2.core-networks.de
MX Priorities
- mx2.core-networks.de: 20
- mx1.core-networks.de: 10
A / AAAA Records
- 217.11.57.211 ↩ 211.57.11.217.in-addr.arpa.manitu.net
Mail Server IPs
- 194.213.5.212 ↩ mx2.core-networks.de
- 2001:1bc0:d::2:12 ↩ mx2.core-networks.de
- 82.96.72.7 ↩ mail.core-networks.de
- 2001:1bc0:d::4:9 ↩ mail.core-networks.de
SOA Record
Raw SOA
ns1.core-networks.de hostmaster.core-networks.de 2024092100 28800 7200 604800 1800
Primary NS (mname)
ns1.core-networks.de
Admin Email (rname)
hostmaster@core-networks.de
Serial
2024092100
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ns1.core-networks.de
ns3.core-networks.com
ns2.core-networks.eu
SPF Record
✓ Strict (-all)
v=spf1 mx a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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 mx a -all
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