post.cz

Valid Email Server
Domain Lookup › post.cz

Domain Overview

DNS: ✓ 13h ago Checker: ✓ 13h ago
post.cz
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 12:27:20 UTC · ↺ Refresh

MX Hostnames

  • mx1.seznam.cz
  • mx2.seznam.cz

MX Priorities

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

A / AAAA Records

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

Mail Server IPs

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

SOA Record

Raw SOA ans.seznam.cz hostmaster.seznam.cz 1779118425 900 300 604800 300
Primary NS (mname)
ans.seznam.cz
Admin Email (rname)
hostmaster@seznam.cz
Serial
1779118425
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
  • SPFv=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all
  • yahoo-verification-key=cs/ENKiKUZG6YJeRCUP+inEHKPZL4kTq5/2jiuAzlpU=
  • google-site-verification=0h2ZT7J97HD4O290m5V54lrNwDNUVcceILaRsdoYIm8
  • google-site-verification=ZoRtMh4cw9Hh5LuGzJ1Vtp-WRRqesvpHvgVmhQoFCqA
  • google-site-verification=vnvf6enSXLiqBU5n4Yz1x7UJSNgJn9gRe_5Clonn2QE
Full email verification for post.cz

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