columbus.edu

Valid Email Server
Domain Lookup › columbus.edu

Domain Overview

DNS: ✓ just now Checker: ✓ just now
columbus.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-16 04:41:21 UTC · ↺ Refresh

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MX Hostnames

  • columbus-edu.mail.protection.outlook.com

MX Priorities

  • columbus-edu.mail.protection.outlook.com: 0

A / AAAA Records

  • 172.67.191.74 (no PTR)
  • 104.21.20.34 (no PTR)
  • 2606:4700:3034::ac43:bf4a
  • 2606:4700:3033::6815:1422

Mail Server IPs

  • 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
  • 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
  • 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
  • 52.101.50.4 ↩ mail-co1pr03cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:f902::2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:c802:: ↩ mail-cy4pr03cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA emma.ns.cloudflare.com dns.cloudflare.com 2405355422 10000 2400 604800 1800
Primary NS (mname)
emma.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2405355422
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

vern.ns.cloudflare.com
emma.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com +a +mx +ip4:66.70.169.56 +ip4:158.69.65.92 +ip4:198.50.234.6 +ip4:51.79.44.74 +ip4:158.69.69.9 ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • MS=ms10784396
  • google-site-verification=tY67TYysyEiuUu0lHMbfG3SUORBwkhFxC5A2eEIf5Vg
  • SPFv=spf1 include:spf.protection.outlook.com +a +mx +ip4:66.70.169.56 +ip4:158.69.65.92 +ip4:198.50.234.6 +ip4:51.79.44.74 +ip4:158.69.69.9 ~all
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