rubcube.com

Valid Email Server
Domain Lookup › rubcube.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rubcube.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-29 09:20:46 UTC · ↺ Refresh

MX Hostnames

  • rubcube-com.mail.protection.outlook.com

MX Priorities

  • rubcube-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 46.202.145.197 (no PTR)

Mail Server IPs

  • 52.101.198.1 ↩ mail-cp4p284cu00401.inbound.protection.outlook.com
  • 52.101.198.38 ↩ mail-cp3p284cu00706.inbound.protection.outlook.com
  • 52.101.200.0 ↩ mail-roap284cu02600.inbound.protection.outlook.com
  • 52.101.198.0 ↩ mail-cp5p284cu01800.inbound.protection.outlook.com
  • 2a01:111:f403:c94a:: ↩ mail-cp5p284cu01800.inbound.protection.outlook.com
  • 2a01:111:f403:c94a::2 ↩ mail-cp3p284cu00702.inbound.protection.outlook.com
  • 2a01:111:f403:c94c:: ↩ mail-roap284cu02600.inbound.protection.outlook.com
  • 2a01:111:f403:c94a::1 ↩ mail-cp4p284cu00401.inbound.protection.outlook.com

SOA Record

Raw SOA ns-873.awsdns-45.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-873.awsdns-45.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1840.awsdns-38.co.uk
ns-61.awsdns-07.com
ns-873.awsdns-45.net
ns-1459.awsdns-54.org

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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

6 records
  • google-site-verification=wmvVf7Lk6vFitW-hG0rbEsAm57WmQcCSGRs_j9ofF-A
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • zoho-verification=zb99260565.zmverify.zoho.com
  • MS=88A987823A0D283E9D3D265D7A99083C78A1BED8
  • MS=ms37806415
  • google-site-verification=bNdeq87SOteBmssotb5i2OLkW17TgXE1ZiTClPj8994
Full email verification for rubcube.com

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