holderconstruction.com

Valid Email Server
Domain Lookup › holderconstruction.com

Domain Overview

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

Checked via [email protected] · 2026-03-23 22:54:34 UTC · ↺ Refresh

MX Hostnames

  • holderconstruction-com.mail.protection.outlook.com

MX Priorities

  • holderconstruction-com.mail.protection.outlook.com: 10

A / AAAA Records

  • 185.230.63.107 ↩ unalocated.63.wixsite.com

Mail Server IPs

  • 52.101.9.17 (no PTR)
  • 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
  • 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
  • 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
  • 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:c902::2 ↩ mail-sj0pr03cu01602.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)

SOA Record

Raw SOA ns91.worldnic.com namehost.worldnic.com 125121811 10800 3600 604800 3600
Primary NS (mname)
ns91.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125121811
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns91.worldnic.com
ns92.worldnic.com

SPF Record

✓ Strict (-all)
v=spf1 exists:%{i}._i.%{d}._d.espf.agari-dns.net include:%{d}.94.spf-protect.agari-dns.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

6 records
  • imhqcn93t17ao4qjonpbb402c7
  • 85nkkgaucrt5jtpelbl6v5aas3
  • SPFv=spf1 exists:%{i}._i.%{d}._d.espf.agari-dns.net include:%{d}.94.spf-protect.agari-dns.net -all
  • pmrlq6cugr5fqj0a3tvrl281n8
  • r0oeuhml5aqq9rb0uav41rh1cv
  • rft97e8ops1fo3blorotlb8t2m
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