Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
horizonhouse.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 01:26:16 UTC · ↺ Refresh
MX Hostnames
- horizonhouse-org.mail.protection.outlook.com
MX Priorities
- horizonhouse-org.mail.protection.outlook.com: 0
A / AAAA Records
- 162.159.135.42 (no PTR)
Mail Server IPs
- 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.10.18 ↩ mail-bn8pr05cu00302.inbound.protection.outlook.com
- 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::2 ↩ mail-ch4pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.bdm.microsoftonline.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1.bdm.microsoftonline.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns3.bdm.microsoftonline.com
ns4.bdm.microsoftonline.com
ns1.bdm.microsoftonline.com
ns2.bdm.microsoftonline.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:69.164.169.122 ip4:76.191.126.131 ip4:69.164.169.115 ip4:76.191.126.132 include:_spf.activedemand.com include:_spf.psm.knowbe4.com include:spf.constantcontact.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
10 records- j99b02j3d0kkv8g0oharbvba2j
- mscid=DirJobGwT1G1eml8e2cYpTALYBC0t3paD9iyQdXOxCr3KG7vTvs/1i4/d6/5uI2ylcTylGdwpUPjaWJWKpOWkw==
- SPFv=spf1 ip4:69.164.169.122 ip4:76.191.126.131 ip4:69.164.169.115 ip4:76.191.126.132 include:_spf.activedemand.com include:_spf.psm.knowbe4.com include:spf.constantcontact.com include:spf.protection.outlook.com -all
- R8op/cy2uY5R9CIUhDkPy4tr+e6m/ZyItjVcofWDgCNM5rFVx3YhWHY7m9cJ7J9IxNDlBNWVteKejYy3TjPZAA==
- traction-guest=478258bb-8765-41ae-86f1-1a1392d834fe
- n54c3irjkfaqa2jmdp6gjv0r4v
- ZOOM_verify_Lo8nLrieRfuVcwdcXCLEvQ
- pPxecKgV
- apple-domain-verification=Bmyk8AMesI9sucz8
- kpitr2dsn05m8toa98708lnpoq
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for horizonhouse.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits