columbiausa.com

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

Domain Overview

DNS: ⚡ live Checker: ⚡ live
columbiausa.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-09 12:05:37 UTC · ↺ Refresh

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<script src="https://check.verifyswift.com/"></script>
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MX Hostnames

  • columbiausa-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 172.67.218.194 (no PTR)
  • 104.21.38.39 (no PTR)
  • 2606:4700:3031::ac43:dac2
  • 2606:4700:3030::6815:2627

Mail Server IPs

  • 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
  • 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
  • 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
  • 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com

SOA Record

Raw SOA betty.ns.cloudflare.com dns.cloudflare.com 2403571864 10000 2400 604800 1800
Primary NS (mname)
betty.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2403571864
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

isaac.ns.cloudflare.com
betty.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:outbound.smtp.wisestamp.net include:4832014.spf05.hubspotemail.net include:amazonses.com ip4:162.245.183.100 ip4:24.196.62.115 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

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

7 records
  • google-site-verification=Sx4rwg2gENci4YbncfYRAI2mwmE4tx6PWugE9TzeO_g
  • google-site-verification=ok5nfrRocoxcIj6itxm7mBFRZmfeGY6svrFlt9HjJyY
  • prowly-verification=555b1a448f55e1d677e7010baecdc21d8a917b1775450d8b813b3cca15d9594b
  • SPFv=spf1 include:spf.protection.outlook.com include:outbound.smtp.wisestamp.net include:4832014.spf05.hubspotemail.net include:amazonses.com ip4:162.245.183.100 ip4:24.196.62.115 -all
  • MS=ms55795043
  • anthropic-domain-verification-rs5k95=ziWRPfmy8bsNL1ks7lOB2P8xq
  • apple-domain-verification=4h5dKv6EXyajiSO9
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