Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
krefeld-business.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 12:57:19 UTC · ↺ Refresh
MX Hostnames
- mx03.hornetsecurity.com
- mx02.hornetsecurity.com
- mx01.hornetsecurity.com
- mx04.hornetsecurity.com
MX Priorities
- mx04.hornetsecurity.com: 40
- mx03.hornetsecurity.com: 30
- mx02.hornetsecurity.com: 20
- mx01.hornetsecurity.com: 10
A / AAAA Records
- 212.76.199.157 ↩ krefeld-business.de
Mail Server IPs
- 94.100.136.7 ↩ mx04.hornetsecurity.com
- 94.100.134.8 ↩ mx03.hornetsecurity.com
- 94.100.136.8 ↩ mx02.hornetsecurity.com
- 94.100.132.8 ↩ mx01.hornetsecurity.com
SOA Record
Raw SOA
dns51.cloudns.net hostmaster.incas.de 2025091602 7200 1800 1209600 3600
Primary NS (mname)
dns51.cloudns.net
Admin Email (rname)
hostmaster@incas.de
Serial
2025091602
Refresh
7200s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
dns54.cloudns.net
dns52.cloudns.net
dns51.cloudns.net
dns53.cloudns.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.incas.de include:spf.hornetsecurity.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
3 records- SPFv=spf1 include:spf.protection.outlook.com include:_spf.incas.de include:spf.hornetsecurity.com -all
- brevo-code:1fa54aeb21e18b6bc222807eafcc5de7
- MS=ms35012375
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