jclibrary.org

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

Domain Overview

DNS: ⚡ live Checker: ⚡ live
jclibrary.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-03 12:03:07 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • jclibrary-org.mail.protection.outlook.com

MX Priorities

  • jclibrary-org.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.26.3.238 (no PTR)
  • 172.67.68.134 (no PTR)
  • 104.26.2.238
  • 2606:4700:20::ac43:4486
  • 2606:4700:20::681a:2ee
  • 2606:4700:20::681a:3ee

Mail Server IPs

  • 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
  • 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
  • 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
  • 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com

SOA Record

Raw SOA karl.ns.cloudflare.com dns.cloudflare.com 2405405939 10000 2400 604800 1800
Primary NS (mname)
karl.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2405405939
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

zelda.ns.cloudflare.com
karl.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 +a +mx include:jclibrary.org.spf.auto.dnssmarthost.net include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:spf.mailjet.com include:amazonses.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],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

8 records
  • amazonses:n5lTv1rMWUIJr+M8f3HKO/tavj13r8vmHjqHkCMG7GQ=
  • google-site-verification=1tTyqMoGtLxYZP5o7PFLBukKFesbykqS7vaZ5N6SopI
  • google-site-verification=5LZe1ykqryA2M4q7s-hn9K-saulT5IJCq4QmnHRe8oo
  • google-site-verification=PtLg70pqaMwxpyVrQgyeXroK4LUltT0Xv87Edu7UU_U
  • google-site-verification=a3ONS2I_fhBzvFLn0HdYhyDZDI5MjT1V_lmQ2LfVnjA
  • prowly-verification=eb5779cd9d52322443ab5da568071b060d7ac158d0ebfc5dfeb496d5a5e0f132
  • SPFv=spf1 +a +mx include:jclibrary.org.spf.auto.dnssmarthost.net include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:spf.mailjet.com include:amazonses.com -all
  • ahrefs-site-verification_fa29ac3bb6e65923a875e7d2eaa5ed8ffbec0c2a3224ff5c6c799707346bba69.
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 · Customize →
See demo & docs
Deep verification
Full email verification for jclibrary.org

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

No credit card required
Get 1,000 Free Credits