cornerstoneonline.com

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

Domain Overview

DNS: ⚡ live Checker: ⚡ live
cornerstoneonline.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 23:14:35 UTC · ↺ Refresh

MX Hostnames

  • cornerstoneonline-com.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 3.33.251.168
  • 15.197.225.128

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns25.domaincontrol.com
ns26.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:192.169.235.118 a include:spf.protection.outlook.com include:spf.exclaimer.net -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

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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

7 records
  • google-site-verification=PP-dwB3ncCDD_-2uY-PxjZHnawMe6_1b1I5nbt_9V8k
  • globalsign-domain-verification=-yBsGUFyAhEdmGNJnroqmTV-n1aFg6pNJF3SPRjW60
  • SPFv=spf1 ip4:192.169.235.118 a include:spf.protection.outlook.com include:spf.exclaimer.net -all
  • google-site-verification=erOc6sQDoQY-_VUqeUsZqsbvmobbKWqTnRquymhX9rs
  • _globalsign-domain-verification=_HeFxZx02OG9pUrA1BNknej5MwdoqIx4leIeHWmjpw
  • google-site-verification=JQPvWd9SvdxmXp02xCHKOreVR9SQY1ckXRABrZWf2m0
  • google-site-verification=O1JpTa3M1wzuEVqOETLV9M4k_l4HJDiynQpgxgCRmnQ
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