cantorcolburn.com

Valid Email Server
Domain Lookup › cantorcolburn.com

Domain Overview

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

Checked via [email protected] · 2026-03-30 19:09:37 UTC · ↺ Refresh

MX Hostnames

  • cantorcolburn-com.mail.protection.outlook.com

MX Priorities

  • cantorcolburn-com.mail.protection.outlook.com: 10

A / AAAA Records

  • 72.32.131.23 ↩ www-dispatch.firmseek.com
  • 216.157.108.97 ↩ d89d6c61.client-ipv4.firmseek.net

Mail Server IPs

  • 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
  • 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
  • 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
  • 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:c901::1 ↩ mail-bl2pr04cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com

SOA Record

Raw SOA ns1-02.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-02.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s

Nameservers (NS)

ns3-02.azure-dns.org
ns4-02.azure-dns.info
ns1-02.azure-dns.com
ns2-02.azure-dns.net

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:131.239.64.87 ip4:131.239.64.88 ip4:131.239.64.89 ip4:131.239.64.82 include:spf.protection.outlook.com include:spf.bluehornet.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
  • MS=ms80553899
  • SPFv=spf1 a mx ip4:131.239.64.87 ip4:131.239.64.88 ip4:131.239.64.89 ip4:131.239.64.82 include:spf.protection.outlook.com include:spf.bluehornet.com -all
  • google-site-verification=sLbNU7xlEbGwXyG__6tl3Hprhj8ZgEu6Uid5LTbQaO8
Full email verification for cantorcolburn.com

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