Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
usa.edu.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 08:16:37 UTC · ↺ Refresh
MX Hostnames
- usa-edu-co.mail.protection.outlook.com
MX Priorities
- usa-edu-co.mail.protection.outlook.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.10.14 ↩ mail-bn6pr04cu00206.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.dreamhost.com hostmaster.dreamhost.com 2025111902 16500 600 1814400 60
Primary NS (mname)
ns1.dreamhost.com
Admin Email (rname)
hostmaster@dreamhost.com
Serial
2025111902
Refresh
16500s
Retry
600s
Expire
1814400s
Minimum TTL
60s
Nameservers (NS)
ns3.dreamhost.com
ns1.dreamhost.com
ns2.dreamhost.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:168.228.124.134 ip4:192.144.114.66 include:spf.protection.outlook.com include:spf.hostmar.com include:spf.mailjet.com include:_spf.qp-mail.com include:50514939.spf06.hubspotemail.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=3600;aspf=s;fo=1
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
2 records- mailjet-domain-validation=FjBZpqpTZRSiGAG
- SPFv=spf1 ip4:168.228.124.134 ip4:192.144.114.66 include:spf.protection.outlook.com include:spf.hostmar.com include:spf.mailjet.com include:_spf.qp-mail.com include:50514939.spf06.hubspotemail.net -all
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