ddb.cz

Valid Email Server
Domain Lookup › ddb.cz
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
ddb.cz
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-21 06:32:22 UTC · ↺ Refresh

MX Hostnames

  • ddb-cz.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 104.21.69.27
  • 172.67.203.47
  • 2606:4700:3034::ac43:cb2f
  • 2606:4700:3032::6815:451b

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

tegan.ns.cloudflare.com
nitin.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1

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

All TXT Records

3 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • atlassian-domain-verification=jnECo5N3FFedMZvGze/NG2GaOw0UEzP3iXUmtmPDs29kJD205r8M0ZM7jTqNrESh
  • google-site-verification=DYejm8OtF-GasMPfJJKl5Sxkr5H9weT2rIqBhEY__Z8
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