prtbuilders.com

Valid Email Server
Domain Lookup › prtbuilders.com

Domain Overview

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

Checked via [email protected] · 2026-03-31 19:59:51 UTC · ↺ Refresh

MX Hostnames

  • prtbuilders-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 185.181.254.133 (no PTR)

Mail Server IPs

  • 52.101.10.14 ↩ mail-bn6pr04cu00206.inbound.protection.outlook.com
  • 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
  • 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
  • 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f905::4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.us6.tmd.cloud servers.mysecurecloudhost.com 2026021303 3600 1800 1209600 86400
Primary NS (mname)
ns1.us6.tmd.cloud
Admin Email (rname)
servers@mysecurecloudhost.com
Serial
2026021303
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns2.us6.tmd.cloud
ns1.us6.tmd.cloud

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ 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

1 record
  • SPFv=spf1 include:spf.protection.outlook.com -all
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