sentinel-builders.com

Valid Email Server
Domain Lookup › sentinel-builders.com

Domain Overview

DNS: ✓ 1d ago Checker: ✓ 1d ago
sentinel-builders.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-21 21:21:18 UTC · ↺ Refresh

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MX Hostnames

  • sentinelbuilders-com02b.mail.protection.outlook.com

MX Priorities

  • sentinelbuilders-com02b.mail.protection.outlook.com: 0

A / AAAA Records

  • 198.49.23.144 (no PTR)
  • 198.49.23.145 (no PTR)
  • 198.185.159.145
  • 198.185.159.144

Mail Server IPs

  • 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
  • 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.41.24 ↩ mail-sj0pr03cu01600.inbound.protection.outlook.com
  • 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::4 ↩ mail-dm6pr05cu00404.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.dotster.com dnsadmin.dotster.com 2013042467 10800 3600 604800 3600
Primary NS (mname)
ns1.dotster.com
Admin Email (rname)
dnsadmin@dotster.com
Serial
2013042467
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns2.dotster.com
ns1.dotster.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:3.214.204.181 ip4:44.211.178.112/28 ip4:3.101.216.144/28 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

✓ 3 found
selector1._domainkey
selector2._domainkey
dkim._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • MS=ms11186059
  • SPFv=spf1 ip4:3.214.204.181 ip4:44.211.178.112/28 ip4:3.101.216.144/28 include:spf.protection.outlook.com -all
  • MS=ms26581637
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