frontierdw.com

Valid Email Server
Domain Lookup › frontierdw.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
frontierdw.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-24 20:00:34 UTC · ↺ Refresh

MX Hostnames

  • frontierdw-com.mail.protection.outlook.com
  • smtp.secureserver.net

MX Priorities

  • smtp.secureserver.net: 20
  • frontierdw-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 172.67.203.191
  • 104.21.22.85
  • 2606:4700:3035::ac43:cbbf
  • 2606:4700:3036::6815:1655

Mail Server IPs

  • 216.69.141.113 ↩ osplibsmtp03-v01.prod.phx3.secureserver.net
  • 216.69.141.84 ↩ osplibsmtp02-v01.prod.phx3.secureserver.net
  • 216.69.141.71 ↩ osplibsmtp01-v01.prod.phx3.secureserver.net
  • 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
  • 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
  • 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
  • 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
  • 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
  • 2a01:111:f403:c902::1

SOA Record

Raw SOA ruth.ns.cloudflare.com dns.cloudflare.com 2399700683 10000 2400 604800 1800
Primary NS (mname)
ruth.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399700683
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

ruth.ns.cloudflare.com
tim.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
  • google-site-verification=Lh-pTsCmEGRqJtKDw46__ybAzruUAJRRBfOw9NypS3o
  • SPFv=spf1 include:spf.protection.outlook.com -all
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