email.cz

Valid Email Server
Domain Lookup › email.cz

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
email.cz
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 14:31:49 UTC · ↺ Refresh

MX Hostnames

  • mx1.seznam.cz
  • mx2.seznam.cz

MX Priorities

  • mx1.seznam.cz: 5
  • mx2.seznam.cz: 10

A / AAAA Records

  • 77.75.78.196 ↩ email.seznam.cz
  • 2a02:598:a::78:196 ↩ email.seznam.cz

Mail Server IPs

  • 77.75.77.90 ↩ mx1.seznam.cz
  • 2a02:598:2::1090 ↩ mx1.seznam.cz
  • 77.75.77.42 ↩ mx2.seznam.cz
  • 2a02:598:2::1042 ↩ mx2.seznam.cz

SOA Record

Raw SOA ans.seznam.cz hostmaster.seznam.cz 1774283944 900 300 604800 300
Primary NS (mname)
ans.seznam.cz
Admin Email (rname)
hostmaster@seznam.cz
Serial
1774283944
Refresh
900s
Retry
300s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ams.seznam.cz
ans.seznam.cz

SPF Record

✓ Soft Fail (~all)
v=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all
📊 DNS lookups: 1/10
? Neutral (?all) — no enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; fo=d; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

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

All TXT Records

5 records
  • yahoo-verification-key=JKT3TaoUJsq+TLBCywJPp4wF2bZwKc+hpiKznQ0KxMQ=
  • google-site-verification=81B6O2TJg35Y2a38Y9dYgceZ1S-2GWpuYlvnHn6KfKk
  • google-site-verification=UwLhzVFjo_JSIeypU2Dg88QjodZUqQpZv9diJ4FbYRM
  • google-site-verification=zSJwGWGLhGV-MvU2zV1Cy9xSI6SCopGopG47r4AVJR4
  • SPFv=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all
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 email.cz

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

No credit card required
Get 1,000 Free Credits