coolmasterstx.com

Valid Email Server
Domain Lookup › coolmasterstx.com

Domain Overview

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

Checked via [email protected] · 2026-03-20 06:39:59 UTC · ↺ Refresh

MX Hostnames

  • coolmasterstx-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 172.67.174.251 (no PTR)
  • 104.21.31.50 (no PTR)
  • 2606:4700:3032::ac43:aefb
  • 2606:4700:3037::6815:1f32

Mail Server IPs

  • 52.101.9.14 ↩ mail-bl0pr03cu00206.inbound.protection.outlook.com
  • 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
  • 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
  • 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com

SOA Record

Raw SOA isla.ns.cloudflare.com dns.cloudflare.com 2395373376 10000 2400 604800 1800
Primary NS (mname)
isla.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2395373376
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

isla.ns.cloudflare.com
sam.ns.cloudflare.com

SPF Record

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

DMARC Record

✗ Missing

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

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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com include:spf.greengeeks.net -all
  • NETORGFT4090059.onmicrosoft.com
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