sx.onmicrosoft.com

Valid Email Server
Domain Lookup › sx.onmicrosoft.com
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
sx.onmicrosoft.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-31 09:11:25 UTC · ↺ Refresh

MX Hostnames

  • sx.mail.protection.outlook.com

MX Priorities

  • sx.mail.protection.outlook.com: 0

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
  • 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
  • 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
  • 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com

SOA Record

No SOA record found.

Nameservers (NS)

No nameservers found.

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
  • mscid=H0xHf4b6nhfTwxCLUOix1mT23ptuMMYCL3ymVQpdM/sF+hpalaFj7uHyzmI7fUc+j9u2y66rz/JJTDhcBhYaDQ==
  • SPFv=spf1 include:spf.protection.outlook.com -all
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