coreinsulators.com

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

Domain Overview

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

Checked via [email protected] · 2026-05-20 22:04:46 UTC · ↺ Refresh

MX Hostnames

  • coreinsulators-com.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 104.200.17.94
  • 2600:3c00::f03c:93ff:fe85:389c

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns-584.awsdns-09.net
ns-1524.awsdns-62.org
ns-2031.awsdns-61.co.uk
ns-476.awsdns-59.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:4.151.126.158 include:spfa.cpmails.com include:spf.protection.outlook.com include:spf-us.emailsignatures365.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]; sp=none; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: none

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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

9 records
  • teamviewer-sso-verification=7a39ec5c9ebd4728a596731b86281836
  • SPFv=spf1 ip4:4.151.126.158 include:spfa.cpmails.com include:spf.protection.outlook.com include:spf-us.emailsignatures365.com -all
  • MS=ms58213464
  • _dmarc.coreinsulators.com 3600 IN TXT "v=DMARC1; p=quarantine"
  • anthropic-domain-verification-bq6y0w=MCee8hJAOBkVFMOEfaPh69WRn
  • apple-domain-verification=Z6rowE7sRT5uwT9d
  • autodesk-domain-verification=7Brfi237o1A5h84Dvke3
  • google-site-verification=LGEvVgYgc1SkvUkH1v-hMaTHCxe9l0Lb6oYCy9Ltjno
  • smartsheet-site-validation=r5h_7WcHmF_inXNPsfjaPMnbjGP9PflL
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