Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
esn.edu.mx
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 20:53:35 UTC · ↺ Refresh
MX Hostnames
- esn-edu-mx.mail.protection.outlook.com
MX Priorities
- esn-edu-mx.mail.protection.outlook.com: 1
A / AAAA Records
- 74.208.236.31 ↩ 74-208-236-31.elastic-ssl.ui-r.com
- 2607:f1c0:100f:f000::200 ↩ 2607-f1c0-100f-f000-0000-0000-0000-0200.elastic-ssl.ui-r.com
Mail Server IPs
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 52.101.50.4 ↩ mail-co1pr03cu00404.inbound.protection.outlook.com
- 2a01:111:f403:c901::1 ↩ mail-bl2pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1045.ui-dns.com hostmaster.1und1.com 2017060190 28800 7200 604800 600
Primary NS (mname)
ns1045.ui-dns.com
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060190
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1045.ui-dns.com
ns1045.ui-dns.org
ns1045.ui-dns.de
ns1045.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 ip4:187.217.179.14 ip4:148.245.6.155 ip4:187.217.179.4 include:mail.zendesk.com include:spf.protection.outlook.com include:mailgun.org -all
📊 DNS lookups: 3/10
✓ 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
✓ 3 found
selector1._domainkey
selector2._domainkey
s1._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
4 records- google-site-verification=EF8hFa1YWUU2HV3Gn4JYyRen6cPtnqsWLjM68HcKXD8
- SPFv=spf1 ip4:187.217.179.14 ip4:148.245.6.155 ip4:187.217.179.4 include:mail.zendesk.com include:spf.protection.outlook.com include:mailgun.org -all
- facebook-domain-verification=4s35nz59plb8jrpednur3se2e8jdvx
- zone-ownership-verification-fee4c768fedc14b3cc74b3a1dd705f2f3ea5300722cc82c1a1b5743dae184ffe
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