cobblestonelearning.com

Valid Email Server
Domain Lookup › cobblestonelearning.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cobblestonelearning.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-20 19:49:22 UTC · ↺ Refresh

MX Hostnames

  • cobblestonelearning-com.mail.protection.outlook.com

MX Priorities

  • cobblestonelearning-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 35.214.232.211 ↩ 211.232.214.35.bc.googleusercontent.com

Mail Server IPs

  • 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
  • 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
  • 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
  • 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::9 ↩ mail-db7pr03cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::3 ↩ mail-am6pr04cu00303.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.siteground.net root.siteground.net 100255 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
root@siteground.net
Serial
100255
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s

Nameservers (NS)

ns2.siteground.net
ns1.siteground.net

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:cobblestonelearning.com.spf.auto.dnssmarthost.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; aspf=r; adkim=r;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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
  • google-site-verification=QFRvVAVFG6sEEheAy_I1KP5pNSJjv9CApntbIUz7vyQ
  • SPFv=spf1 include:spf.protection.outlook.com include:cobblestonelearning.com.spf.auto.dnssmarthost.net -all
  • google-site-verification=hIwu6c5QUfb1QZ-eIKs6yr5ur6JvvrcdQsDuoFDgl1g
Full email verification for cobblestonelearning.com

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