columbiaptrs.com

Valid Email Server
Domain Lookup › columbiaptrs.com

Domain Overview

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

Checked via [email protected] · 2026-03-21 07:51:48 UTC · ↺ Refresh

MX Hostnames

  • columbiaptrs-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 52.101.194.12 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
  • 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
  • 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
  • 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
  • 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
  • 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA aida.ns.cloudflare.com dns.cloudflare.com 2398186584 10000 2400 604800 1800
Primary NS (mname)
aida.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398186584
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

jack.ns.cloudflare.com
aida.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:216.3.232.130 -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

✗ 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

3 records
  • SPFv=spf1 include:spf.protection.outlook.com ip4:216.3.232.130 -all
  • MS=ms15902656
  • SPFv=spf1 a mx ip4:199.19.97.204 ip4:67.217.191.71 ip4:69.65.18.110 ip4:66.104.26.178 ip4:209.155.228.146 a:mail.columbiaptrs.com a:cpwb01.columbiaptrs.com a:cpnm02.columbiaptrs.com include:lightindustries.com ~all
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