usantoto.edu.co

Valid Email Server
Domain Lookup › usantoto.edu.co

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
usantoto.edu.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 11:34:49 UTC · ↺ Refresh

MX Hostnames

  • usantoto-edu-co.mail.protection.outlook.com

MX Priorities

  • usantoto-edu-co.mail.protection.outlook.com: 0

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 52.101.9.17 (no PTR)
  • 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
  • 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
  • 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
  • 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA dns3.ustatunja.edu.co it.tic.ustatunja.edu.co 2023041000 28800 14400 3600000 86400
Primary NS (mname)
dns3.ustatunja.edu.co
Admin Email (rname)
it@tic.ustatunja.edu.co
Serial
2023041000
Refresh
28800s
Retry
14400s
Expire
3600000s
Minimum TTL
86400s

Nameservers (NS)

dns3.ustatunja.edu.co

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: 392 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

4 records
  • "v=spf1 include:spf.protection.outlook.com -all"
  • MS=ms40022122
  • MS=ms33653563
  • SPFv=spf1 include:spf.protection.outlook.com -all
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