usanmarcos.ac.cr

Valid Email Server
Domain Lookup › usanmarcos.ac.cr

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
usanmarcos.ac.cr
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-31 08:57:35 UTC · ↺ Refresh

MX Hostnames

  • usanmarcos-ac-cr.mail.protection.outlook.com

MX Priorities

  • usanmarcos-ac-cr.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.20.44.131 (no PTR)
  • 172.66.175.105 (no PTR)
  • 2606:4700:10::6814:2c83
  • 2606:4700:10::ac42:af69

Mail Server IPs

  • 52.101.10.18 ↩ mail-bn8pr05cu00302.inbound.protection.outlook.com
  • 52.101.9.17 (no PTR)
  • 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
  • 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
  • 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::4 ↩ mail-dm6pr05cu00404.inbound.protection.outlook.com

SOA Record

Raw SOA kai.ns.cloudflare.com dns.cloudflare.com 2400168734 10000 2400 604800 1800
Primary NS (mname)
kai.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400168734
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

kai.ns.cloudflare.com
melinda.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:23.143.96.1 ip4:66.231.226.1 include:spf.protection.outlook.com include:mktomail.com include:mailgun.org include:zcsend.net include:44653790.spf04.hubspotemail.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 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

9 records
  • ciscocidomainverification=1e45b80e963ca72588c537b172f9c4f9ca9d84aacc09132fbac282477c3669aa
  • google-site-verification=AFJ9oIIRuFqvs39XgQ4feckfESpufZ6uqX5DpkoT7eY
  • google-site-verification=pNyglx9XE5ldshHjDFc8dWAdPLUe1k8lSnJUNkb5hRk
  • h1j2vibd0r4c078gftv5s5jft
  • i9uuj75o0i2dg73632fito8bcb
  • SPFv=spf1 ip4:23.143.96.1 ip4:66.231.226.1 include:spf.protection.outlook.com include:mktomail.com include:mailgun.org include:zcsend.net include:44653790.spf04.hubspotemail.net -all
  • 1a8f5berh9qpfn58v5s2ah10e5
  • MS=ms92311624
  • _f7lt3r6j64xscptsyuvxyy7mm0b90lw
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