library.columbia.edu

Valid Email Server
Domain Lookup › library.columbia.edu
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
library.columbia.edu
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-17 22:46:45 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 128.59.105.210 ↩ library-ci-old.columbia.edu

Mail Server IPs

  • 148.163.139.74 ↩ mx0b-00364e01.pphosted.com
  • 148.163.135.74 ↩ mx0a-00364e01.pphosted.com

SOA Record

No SOA record found.

Nameservers (NS)

No nameservers found.

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

5 records
  • atlassian-domain-verification=iNM6E7UNh2OsmpbO1ay/kp905hCET09I2tucPqHKcJ9wAz2fJZNbeqvC5AN3NsEb
  • apple-domain-verification=YHxVT80Io5C6RVuI
  • google-site-verification=-8HGfOJHFs1mOIh8Yetxk0C5wuc28oVlyntVh2n6pzU
  • atlassian-sending-domain-verification=4849af9d-6a44-4225-a679-93b00f874bd0
  • SPFv=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for library.columbia.edu

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits