cornerstoneschools.org

Valid Email Server
Domain Lookup › cornerstoneschools.org

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cornerstoneschools.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-21 03:54:27 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 141.193.213.20 (no PTR)
  • 141.193.213.21 (no PTR)

Mail Server IPs

  • 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
  • 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
  • 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
  • 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f905::3 ↩ mail-dm5pr02cu00203.inbound.protection.outlook.com

SOA Record

Raw SOA ns11.domaincontrol.com dns.jomax.net 2024012400 28800 7200 604800 600
Primary NS (mname)
ns11.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024012400
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns12.domaincontrol.com
ns11.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:173.15.242.85 include:spf.protection.outlook.com include:secure.infosnap.com include:customerspf.schoolmessenger.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 1 found
google._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • google-site-verification=jZxivlT794MIRanpVfR6D2mj1kqLJ1qaxeMOyHWJ6a8
  • google-site-verification=o45PWG0qh3vg2Xd8ZQ0Y9g9-3KJJcceVjYKjI7pdR-g
  • MS=ms37468992
  • include:secure.infosnap.com
  • SPFv=spf1 ip4:173.15.242.85 include:spf.protection.outlook.com include:secure.infosnap.com include:customerspf.schoolmessenger.com -all
  • exists:%{i}._spf.inkyphishfence.com
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