defenddfw.com

Valid Email Server
Domain Lookup › defenddfw.com

Domain Overview

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

Checked via [email protected] · 2026-03-20 08:49:10 UTC · ↺ Refresh

MX Hostnames

  • defenddfw-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 104.21.86.29 (no PTR)
  • 172.67.214.99 (no PTR)
  • 2606:4700:3031::6815:561d
  • 2606:4700:3031::ac43:d663

Mail Server IPs

  • 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
  • 52.101.9.17 (no PTR)
  • 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
  • 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
  • 2a01:111:f403:f905::4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com

SOA Record

Raw SOA alex.ns.cloudflare.com dns.cloudflare.com 2398490923 10000 2400 604800 1800
Primary NS (mname)
alex.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398490923
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

alex.ns.cloudflare.com
tricia.ns.cloudflare.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

2 records
  • MS=ms37639784
  • SPFv=spf1 include:spf.protection.outlook.com -all
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