harbordubai.com

Valid Email Server

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
harbordubai.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-21 15:58:10 UTC · ↺ Refresh

MX Hostnames

  • harbordubai-com.mail.protection.outlook.com

MX Priorities

  • harbordubai-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 162.241.137.203 ↩ 4991130.harbordubai.com

Mail Server IPs

  • 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
  • 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
  • 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
  • 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::4 ↩ mail-db4pr02cu00204.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.harbordubai.com root.4991130.harbordubai.com 2026031701 3600 1800 1209600 86400
Primary NS (mname)
ns1.harbordubai.com
Admin Email (rname)
root@4991130.harbordubai.com
Serial
2026031701
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns1.harbordubai.com
ns2.harbordubai.com

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:198.1.69.251 ip4:198.154.233.53 ip4:162.241.137.203 include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s;pct=100;fo=0;rf=afrf;ri=86400;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict · DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

DKIM Selectors

✓ 3 found
selector1._domainkey
selector2._domainkey
default._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

5 records
  • twilio-domain-verification=c2ec806193facbdaa9405778cf5132eb
  • MS=ms28927269
  • SPFv=spf1 a mx ip4:198.1.69.251 ip4:198.154.233.53 ip4:162.241.137.203 include:spf.protection.outlook.com -all
  • google-site-verification=ctBxZylIeSCUJN62tzF9gVpATSQkIaqZ-M6T8BHqU-U
  • openai-domain-verification=dv-Y78duVm4fzv25ipdKMSOQ0pK
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 harbordubai.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits