kastlebuilders.com

Valid Email Server
Domain Lookup › kastlebuilders.com

Domain Overview

DNS: ✓ just now Checker: ✓ just now
kastlebuilders.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-09-23 12:55:13 UTC · ↺ Refresh

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MX Hostnames

  • kastlebuilders-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 68.65.122.207 (no PTR)

Mail Server IPs

  • 52.101.9.20 ↩ mail-bl0pr02cu00604.inbound.protection.outlook.com
  • 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 52.101.41.192 ↩ mail-byapr04cu00400.inbound.protection.outlook.com
  • 52.101.60.65 ↩ mail-bn3pr02cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
  • 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
  • 2a01:111:f403:f90d:: ↩ mail-sn1pr0501cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com

SOA Record

Raw SOA dns1.namecheaphosting.com audit.namecheaphosting.com 1710032170 86400 7200 3600000 86400
Primary NS (mname)
dns1.namecheaphosting.com
Admin Email (rname)
audit@namecheaphosting.com
Serial
1710032170
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s

Nameservers (NS)

dns1.namecheaphosting.com
dns2.namecheaphosting.com

SPF Record

✓ Strict (-all)
v=spf1 mx include:spf.protection.outlook.com include:secureserver.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

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

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

All TXT Records

2 records
  • SPFv=spf1 mx include:spf.protection.outlook.com include:secureserver.net -all
  • MS=ms96204447
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