Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kolbus.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 02:30:26 UTC · ↺ Refresh
MX Hostnames
- kolbus-de.mail.protection.outlook.com
MX Priorities
- kolbus-de.mail.protection.outlook.com: 50
A / AAAA Records
- 81.88.33.88 ↩ cloud6-vm523.de-nserver.de
Mail Server IPs
- 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
- 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
pdns05.domaincontrol.com dns.jomax.net 2026020295 28800 7200 604800 600
Primary NS (mname)
pdns05.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026020295
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
pdns06.domaincontrol.com
pdns05.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:81.88.33.88 ip4:80.237.132.61 ip4:5.7.144.56/29 ip4:80.228.247.60 include:spf.protection.outlook.com include:8618799.spf02.hubspotemail.net include:kolbus.com include:spf.server-he.de -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
2 records- SPFv=spf1 mx a ip4:81.88.33.88 ip4:80.237.132.61 ip4:5.7.144.56/29 ip4:80.228.247.60 include:spf.protection.outlook.com include:8618799.spf02.hubspotemail.net include:kolbus.com include:spf.server-he.de -all
- google-site-verification=j3HbZHxO1ctes_N0pDdOoOG9rgW8FSMjFsl91Ur-glY
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