Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
columbia.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 05:10:25 UTC · ↺ Refresh
MX Hostnames
- columbia-com.mail.protection.outlook.com
MX Priorities
- columbia-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.18.67.112 (no PTR)
- 104.18.68.112 (no PTR)
- 2606:4700::6812:4370
- 2606:4700::6812:4470
Mail Server IPs
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.11.19 ↩ mail-sa9pr04cu00203.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
SOA Record
Raw SOA
pdns1.ultradns.net domainservices.columbia.com 2013111939 3600 3600 432000 1800
Primary NS (mname)
pdns1.ultradns.net
Admin Email (rname)
domainservices@columbia.com
Serial
2013111939
Refresh
3600s
Retry
3600s
Expire
432000s
Minimum TTL
1800s
Nameservers (NS)
pdns5.ultradns.info
pdns6.ultradns.co.uk
pdns1.ultradns.net
pdns2.ultradns.net
pdns3.ultradns.org
pdns4.ultradns.org
SPF Record
✓ Strict (-all)
v=spf1 a:mail.columbia.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; fo=1; adkim=s; aspf=s; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
24 records- b47420b292ef17828a0950d3affc8b71cda92324df0701f0c5
- MS=ms73399519
- onetrust-domain-verification=f963d4c5e2624490aff873acaf3bd38f
- gc-ai-domain-verification-92zh48=mEyVxKjtuI5MbIRAusRumoxGW
- ms-domain-verification=665c5a1e-5209-4af2-ad15-7a2e171115a6
- 4a03362e69c43c95a3cc4c173d2edaff005a9ea9cfbbf3247ad8e928b736f9c8
- _dkt2x19pgqzs91115z7ea869hg1j34l
- jamf-site-verification=8xwmpY_1toxN3ds0Jpg_3A
- miro-verification=0d8b3cbd075f149e2579d7e8c0fe79edf075f4a6CODE
- atlassian-domain-verification=ggPYKdekKdsncpIm684g7x8BVCU7lFeVccJ7LA4mr6Uw7djwuFVkZ53ML6y5CO87
- bv-domain-verification=b22f317d40d93dfd186f52dd9b9ddc93d48e0d9bc6f7ccdf73b09433858d562a
- airtable-verification=099df3384f94699900c8e2a7b8707826
- webexdomainverification.ESZP=12dd62ab-b230-401d-a047-c21003ccfd26
- paloaltonetworks-site-verification=868c329f657246d726c82430026a35b6bdcc81fffe351d849bcf480329fb9b14
- docusign=61c3b2f7-d0d2-4100-afc1-db9099e0f984
- SPFv=spf1 a:mail.columbia.com include:spf.protection.outlook.com -all
- atlassian-sending-domain-verification=33e60352-8ce2-4867-9348-bfb0b767a04f
- figma-domain-verification=8bff2d3d21561a8cc6cdb1c5ba603fa9dd545264a7ea87b7503cc0ad010e11fd-1721717707
- reFykRtKkk7iOvKlTteYuhiO+8rzqc2ByMfqY7rw2C6iA8pydrTElLDMqIUdCHHypMxsp2S4sTmBHBDPL/NO3A==
- teamviewer-sso-verification=17873b49213f4a3181ab0c6cd697ddb9
- google-site-verification=-RZsr136ZpUvZRBRRGQ1zH-SDuhUWZtyiQQFtmGFKjw
- adobe-idp-site-verification=fe067ffe-0a51-4f92-a489-f6edcf3bb6fb
- 1146f980ea784356d44fa8fc04a6f625.columbia.com
- google-site-verification=Tr-XLFvPMaIknXf5597Cb06ai4amv5HCIMIdVRDTYNY
Full email verification for columbia.com
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