prezero.us

Valid Email Server
Domain Lookup › prezero.us

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
prezero.us
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-19 08:24:50 UTC · ↺ Refresh

MX Hostnames

  • prezero-us.mail.protection.outlook.com

MX Priorities

  • prezero-us.mail.protection.outlook.com: 10

A / AAAA Records

  • 45.129.42.3 (no PTR)

Mail Server IPs

  • 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
  • 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.prezero.us hostmaster.prezero.us 2025071700 86400 7200 3600000 172800
Primary NS (mname)
ns1.prezero.us
Admin Email (rname)
hostmaster@prezero.us
Serial
2025071700
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
172800s

Nameservers (NS)

ns.do-ex.org
ns.do-ex.com
ns.do-ex.net

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

✓ 2 found
selector1._domainkey
selector2._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

5 records
  • swisssign-check=4reU729e_seO7SujplXxvj-F_sI
  • google-site-verification=HoMKqtFDhUieO703EGL5hbKFd1AEUYbOQ6ACTw1iMVY
  • adobe-idp-site-verification=180da7a190fa4e0d92b513ceb07c05737d8dc50f521fcfd82319bd6a52116153
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms48355500
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