h2o-optimizer.com

Valid Email Server
Domain Lookup › h2o-optimizer.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
h2o-optimizer.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 13:31:44 UTC · ↺ Refresh

MX Hostnames

  • h2ooptimizer-com0i.mail.protection.outlook.com

MX Priorities

  • h2ooptimizer-com0i.mail.protection.outlook.com: 0

A / AAAA Records

  • 50.87.86.21 ↩ 50-87-86-21.unifiedlayer.com

Mail Server IPs

  • 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
  • 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
  • 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
  • 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::4 ↩ mail-dm6pr05cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:c946::2 ↩ mail-ch4pr04cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.justhost.com root.just2056.justhost.com 2025040400 86400 7200 3600000 300
Primary NS (mname)
ns1.justhost.com
Admin Email (rname)
root@just2056.justhost.com
Serial
2025040400
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
300s

Nameservers (NS)

ns1.justhost.com
ns2.justhost.com

SPF Record

✓ Strict (-all)
v=spf1 +a +mx +ip4:173.254.29.33 +ip4:50.87.86.21 +include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 168 chars (valid)
✓ DKIM properly configured for selector: default

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

1 record
  • SPFv=spf1 +a +mx +ip4:173.254.29.33 +ip4:50.87.86.21 +include:spf.protection.outlook.com -all
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