cubefour.de

Valid Email Server
Domain Lookup › cubefour.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cubefour.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-02 16:13:43 UTC · ↺ Refresh

MX Hostnames

  • cubefour-de.mail.protection.outlook.com

MX Priorities

  • cubefour-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 217.160.125.35 (no PTR)

Mail Server IPs

  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
  • 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
  • 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com

SOA Record

Raw SOA shades17.rzone.de hostmaster.strato-rz.de 2020052329 86400 7200 604800 300
Primary NS (mname)
shades17.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020052329
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

shades17.rzone.de
docks04.rzone.de

SPF Record

✓ Strict (-all)
v=spf1 mx a ptr include:spf.protection.outlook.com include:mo4-p00-ob.smtp.rzone.de -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No 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 ptr include:spf.protection.outlook.com include:mo4-p00-ob.smtp.rzone.de -all
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