firedefense.net

Valid Email Server
Domain Lookup › firedefense.net

Domain Overview

DNS: ✓ just now Checker: ✓ just now
firedefense.net
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-09-23 12:50:06 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • firedefense-net.mail.protection.outlook.com

MX Priorities

  • firedefense-net.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.239.230.221 (no PTR)

Mail Server IPs

  • 52.101.41.201 ↩ mail-byapr03cu00201.inbound.protection.outlook.com
  • 52.101.60.154 ↩ mail-bn0pr03cu00302.inbound.protection.outlook.com
  • 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
  • 52.101.41.24 ↩ mail-sj0pr03cu01600.inbound.protection.outlook.com
  • 2a01:111:f403:f909::d ↩ mail-bn0pr04cu01005.inbound.protection.outlook.com
  • 2a01:111:f403:c927::7 ↩ mail-bn0pr04cu00907.inbound.protection.outlook.com
  • 2a01:111:f403:f909::3 ↩ mail-bnypr03cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f90a::4 ↩ mail-bnypr04cu00104.inbound.protection.outlook.com

SOA Record

Raw SOA ns95.worldnic.com namehost.worldnic.com 123092017 10800 3600 604800 3600
Primary NS (mname)
ns95.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
123092017
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns96.worldnic.com
ns95.worldnic.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
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms88048633
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for firedefense.net

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits