mastersystem.com

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

Domain Overview

DNS: ⚡ live Checker: ⚡ live
mastersystem.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-21 00:17:30 UTC · ↺ Refresh

MX Hostnames

  • mastersystem-com.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 75.2.70.75
  • 99.83.190.102

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns1.bdm.microsoftonline.com
ns2.bdm.microsoftonline.com
ns3.bdm.microsoftonline.com
ns4.bdm.microsoftonline.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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
  • mscid=wpnvv212iMJ5G/EEPBjmgCwHCJvq6iw7hbsBQyCUBsvjcefAPiLZcavBniGjyxa8v/JED7TUg2PdPwttsv+PAA==
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • google-site-verification=y2WnzLbhg96Ns98D7znhu9WyTV6CYx7gWZbJZBs175U
  • include:21433250.spf04.hubspotemail.net
  • have-i-been-pwned-verification=dweb_92cbt50zq5vtlnl661y0jb9a
  • atlassian-domain-verification=bR9S8UnwCNeRuMhem3qEDEOJHba8IQ86EahDgw3Hk0sfGRm5jZwjo7chmH1MJZXh
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