mmbcontractors.com

Valid Email Server
Domain Lookup › mmbcontractors.com

Domain Overview

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

Checked via [email protected] · 2026-03-18 14:58:26 UTC · ↺ Refresh

MX Hostnames

  • mmbcontractors-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 198.71.189.51 ↩ 51.189.71.198.host.secureserver.net

Mail Server IPs

  • 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
  • 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
  • 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
  • 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)
  • 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.101domain.com admin.mmbcontractors.com 2017033025 10800 3600 604800 38400
Primary NS (mname)
ns1.101domain.com
Admin Email (rname)
admin@mmbcontractors.com
Serial
2017033025
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
38400s

Nameservers (NS)

ns5.101domain.com
ns2.101domain.com
ns1.101domain.com

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

✗ 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

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