osterlingfirm.com

Valid Email Server
Domain Lookup › osterlingfirm.com

Domain Overview

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

Checked via [email protected] · 2026-04-03 06:43:00 UTC · ↺ Refresh

MX Hostnames

  • osterlingfirm-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 162.216.112.178 ↩ tyrosh.gearslite.info

Mail Server IPs

  • 52.101.50.4 ↩ mail-co1pr03cu00404.inbound.protection.outlook.com
  • 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
  • 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
  • 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
  • 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
  • 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA dns1.amx.com.pe hostmaster.osterlingfirm.com 2015010898 5400 600 90000 7200
Primary NS (mname)
dns1.amx.com.pe
Admin Email (rname)
hostmaster@osterlingfirm.com
Serial
2015010898
Refresh
5400s
Retry
600s
Expire
90000s
Minimum TTL
7200s

Nameservers (NS)

ns1.telmex.net.pe
ns2.telmex.net.pe

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

1 record
  • SPFv=spf1 include:spf.protection.outlook.com -all
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