columbiasc.net

Valid Email Server
Domain Lookup › columbiasc.net
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
columbiasc.net
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-03 07:54:45 UTC · ↺ Refresh

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MX Hostnames

  • columbiasc-net.mail.protection.outlook.com

MX Priorities

  • columbiasc-net.mail.protection.outlook.com: 1

A / AAAA Records

  • 172.67.70.62 (no PTR)
  • 104.26.1.235 (no PTR)
  • 104.26.0.235
  • 2606:4700:20::ac43:463e
  • 2606:4700:20::681a:1eb
  • 2606:4700:20::681a:eb

Mail Server IPs

  • 52.101.9.19 ↩ mail-blapr09cu00103.inbound.protection.outlook.com
  • 52.101.8.50 ↩ mail-dm6pr09cu00202.inbound.protection.outlook.com
  • 52.101.8.52 ↩ mail-ds0pr09cu00104.inbound.protection.outlook.com
  • 52.101.11.12 ↩ mail-sa9pr09cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:f904:: ↩ mail-dm6pr09cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:f904::1 ↩ mail-ds0pr09cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f90e::1 ↩ mail-sa9pr09cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f900::1 ↩ mail-blapr09cu00101.inbound.protection.outlook.com

SOA Record

Raw SOA chan.ns.cloudflare.com dns.cloudflare.com 2404965871 10000 2400 604800 1800
Primary NS (mname)
chan.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2404965871
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

dane.ns.cloudflare.com
chan.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:167.7.188.99 ip4:167.7.188.100 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0:d; adkim=r; aspf=r
⚠ 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

4 records
  • qZurw92Ufe2BHUwZAfygdo7MWLBfwTvo87qC3eV+B462RJQa92DBzU79xPtfCJ3zo2yFrqFINyed8/qJ4wAAlg==
  • SPFv=spf1 include:spf.protection.outlook.com ip4:167.7.188.99 ip4:167.7.188.100 -all
  • Iuw/mBoK314jszME3EZr2j4gjGizLu1K0bZDvrGzLVPDq2VN50rgLH5P3XfoMmBtQwaF828TPozGyIMUc5qiTA==
  • MS=ms33641636
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