vsb.cz

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

Domain Overview

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

Checked via [email protected] · 2026-06-30 09:13:27 UTC · ↺ Refresh

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MX Hostnames

  • postak.vsb.cz
  • mx30.vsb.cz
  • smtp.vsb.cz

MX Priorities

  • postak.vsb.cz: 20
  • mx30.vsb.cz: 30
  • smtp.vsb.cz: 40

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 158.196.149.150 ↩ postak.vsb.cz
  • 2001:718:1001:149::150 ↩ postak3.vsb.cz
  • mx1.vsb.cz. (no PTR)
  • 158.196.149.35 ↩ mx1.vsb.cz
  • 2001:718:1001:149::35 ↩ mx1.vsb.cz
  • 158.196.149.155 ↩ smtp.vsb.cz
  • 2001:718:1001:149::155 ↩ smtp.vsb.cz

SOA Record

Raw SOA decsys.vsb.cz hostmaster.vsb.cz 260717022 3600 3600 604800 600
Primary NS (mname)
decsys.vsb.cz
Admin Email (rname)
hostmaster@vsb.cz
Serial
260717022
Refresh
3600s
Retry
3600s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

nsa.ces.net
sun.uakom.sk
decsys.vsb.cz

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:158.196.149.35 ip4:158.196.149.77 ip4:158.196.149.150 ip4:158.196.149.155 ip4:158.196.149.213 ip4:158.196.149.214 ip4:195.113.113.86 ip6:2001:718:1001:149::35 ip6:2001:718:1001:149::77 ip6:2001:718:1001:149::150 ip6:2001:718:1001:149::155 ip6:2001:718:1001:149::213 ip6:2001:718:1001:149::214 include:spf.protection.outlook.com include:_spf.google.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; aspf=r; adkim=r; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default

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

All TXT Records

6 records
  • atlassian-domain-verification=PVJmH5mprRkDMCb9DCk/UbTKjKtVvUHtJL8Emmc/vnuCsuADf4R5EJjlS6uHjLr/
  • SPFv=spf1 ip4:158.196.149.35 ip4:158.196.149.77 ip4:158.196.149.150 ip4:158.196.149.155 ip4:158.196.149.213 ip4:158.196.149.214 ip4:195.113.113.86 ip6:2001:718:1001:149::35 ip6:2001:718:1001:149::77 ip6:2001:718:1001:149::150 ip6:2001:718:1001:149::155 ip6:2001:718:1001:149::213 ip6:2001:718:1001:149::214 include:spf.protection.outlook.com include:_spf.google.com ~all
  • 00D24000000jMym=1TBJv000000062D
  • pexip-portal-domain-verification=ba5e6ec4-776f-49cc-b6fe-8a11e1e5128d
  • pexip-ms-tenant-domain-verification=ba5e6ec4-776f-49cc-b6fe-8a11e1e5128d
  • ShdMCDo2dIXrp31AT7HrMwp9LdlLHm5hgDW9SsGbsG6Th9o/4sNO4liyPiH5hfwgYa+yhi7sHYm+dd7BJatrFg==
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