adcu.columbia.edu

Valid Email Server
Domain Lookup › adcu.columbia.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
adcu.columbia.edu
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-19 06:32:38 UTC · ↺ Refresh

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MX Hostnames

  • mxb-00364e01.gslb.pphosted.com
  • mxa-00364e01.gslb.pphosted.com

MX Priorities

  • mxa-00364e01.gslb.pphosted.com: 10
  • mxb-00364e01.gslb.pphosted.com: 10

A / AAAA Records

  • 128.59.41.80 ↩ mshadcuprddc03.adcu.columbia.edu
  • 207.10.140.94 ↩ syradcuprddc03.adcu.columbia.edu
  • 207.10.140.95 ↩ syradcuprddc04.adcu.columbia.edu
  • 128.59.41.81 ↩ mshadcuprddc04.adcu.columbia.edu

Mail Server IPs

  • 148.163.135.74 ↩ mx0a-00364e01.pphosted.com

SOA Record

Raw SOA ext-ns1.columbia.edu hostmaster.columbia.edu 582766272 3600 1800 2419200 300
Primary NS (mname)
ext-ns1.columbia.edu
Admin Email (rname)
hostmaster@columbia.edu
Serial
582766272
Refresh
3600s
Retry
1800s
Expire
2419200s
Minimum TTL
300s

Nameservers (NS)

ext-ns2.columbia.edu
ext-ns1.columbia.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected];
⚠ 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

3 records
  • MS=ms86972561
  • SPFv=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
  • iYBRI+AvXayqEGbqZ4g8gE4O8l71HL4qtgjJg6IdZOTSt9MyYiSn3DU80czqd5nR4udFRcUMN4er8VS/tbD6Ew==
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