seznam.cz - Email Domain Verification & Deliverability Report

Active Free Email Provider
Organization: Seznam.cz
Mail Server: seznam.cz
Verified 5 days ago

Real-time verification data for Seznam.cz (seznam.cz). A Free Email Provider .

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MX Records for seznam.cz

PriorityMail ServerIP Address
10 mx1.seznam.cz 77.75.77.90
20 mx2.seznam.cz 77.75.77.42
SMTP Status: Responding
SMTP Banner:
220 email.seznam.cz ESMTP

seznam.cz uses seznam.cz mail servers, which means emails are processed through seznam.cz infrastructure with their built-in spam filtering and security controls.

Email Authentication for seznam.cz

SPF Record Pass

v=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of seznam.cz.

DMARC Record None

v=DMARC1; p=none; rua=mailto:abuse@seznam.cz

DMARC (Domain-based Message Authentication) tells receiving servers what to do with emails that fail authentication checks.

DKIM Not Detected

DKIM detection is limited from external scanning. The domain may use DKIM with selectors not covered by our scan.

Authentication Summary: seznam.cz has SPF and DMARC configured. This provides good protection against email spoofing. Senders can expect reliable email delivery to this domain.

WHOIS & Domain Information

Registration Details

Domain
seznam.cz
TLD
.cz
Created
1996-10-07
Updated
2025-11-14
Expires
2026-10-29
Domain Age
29 years

Registrar

Name
REG-CZNIC

Registrant Contact

Name
Pavel Zima
Organization
Seznam.cz, a.s.
Location
Praha 5, CZECH REPUBLIC

Technical Contact

Name
CZ.NIC, z.s.p.o.
Organization
CZ.NIC, z.s.p.o.
Location
Praha 3, CZECH REPUBLIC

Name Servers

  • ans.seznam.cz
  • ams.seznam.cz

About seznam.cz Email Verification

seznam.cz is the Czech Republic's largest web portal and email service, operated by Seznam.cz a.s. based in Prague. Seznam dominates the Czech search market and provides free email to millions of Czech users with generous storage, spam filtering, and mobile access.

seznam.cz implements SPF, DKIM, and DMARC authentication. As the Czech Republic's dominant internet platform, Seznam maintains robust anti-spam infrastructure. The service complies with EU GDPR and Czech data protection regulations.

The seznam.cz mail servers enforce strict recipient verification and reject invalid addresses. The domain does not function as catch-all. Seznam applies rate limiting, especially from international senders.

For delivery to seznam.cz, authenticate with SPF, DKIM, and DMARC. Use UTF-8 for Czech characters. Follow Seznam's postmaster guidelines for optimal deliverability.

How to Verify seznam.cz Email Addresses

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Verify seznam.cz Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates seznam.cz email addresses at the point of entry, blocking invalid, disposable, and risky addresses before they enter your database. Integrate with a single API call and prevent bad data at the source.

Frequently Asked Questions

Yes, seznam.cz is a valid free email domain operated by Seznam.cz. It provides permanent email accounts to users.
No, seznam.cz is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
seznam.cz uses mail servers operated by Seznam.cz. Check the MX records section above for specific server details.
Yes, with proper opt-in consent. Follow email best practices and ensure SPF, DKIM, and DMARC authentication is configured for your sending domain.
Use BulkEmailChecker to verify seznam.cz addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.
The fastest and most accurate way to verify a seznam.cz email address is to use BulkEmailChecker's free email verification tool. Simply enter the full email address and our system performs SMTP-level validation by connecting directly to seznam.cz's mail servers. You'll get instant results showing whether the mailbox exists, is deliverable, and is safe to send to, all without sending a single email.
Yes. BulkEmailChecker uses SMTP verification to check if a seznam.cz mailbox exists without ever delivering an email. Our system connects to the domain's mail server, performs an SMTP handshake, and queries the mail server to confirm whether the recipient address is valid. This process is completely invisible to the email recipient and does not affect your sender reputation.
Sending to invalid email addresses causes hard bounces, which directly damage your sender reputation. Internet Service Providers (ISPs) and email providers track your bounce rate, and if it exceeds 2%, your emails may start landing in spam folders or get blocked entirely. Verifying seznam.cz addresses with BulkEmailChecker before sending prevents bounces and keeps your deliverability high.
BulkEmailChecker's bulk verification service lets you upload a CSV or TXT file containing thousands of seznam.cz email addresses and verify them all at once. Each address goes through 30+ verification checks including syntax validation, DNS/MX lookup, SMTP verification, disposable domain detection, and spam trap identification. Results are typically ready within minutes and can be downloaded as a clean, verified list.
Email verification is the process of confirming that an email address is real, properly formatted, and capable of receiving messages. It matters because sending to invalid addresses causes bounces, damages your sender reputation, wastes marketing budget, and can get your sending IP blacklisted. BulkEmailChecker verifies addresses at the SMTP level, the most accurate method available, ensuring your emails reach real people.
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. When you send an email, your mail server looks up the recipient domain's MX records to find where to deliver the message. If a domain has no MX records, it cannot receive email. BulkEmailChecker checks MX records as part of every verification to confirm the domain is configured for email delivery.
A catch-all (or accept-all) domain is configured to accept email sent to any address at that domain, regardless of whether the specific mailbox exists. This makes it harder to verify individual addresses because the server always responds positively. BulkEmailChecker detects catch-all configurations and flags them in verification results so you can make informed decisions about sending to those addresses.
Yes. BulkEmailChecker offers a real-time email verification API that you can integrate into signup forms, CRM systems, lead capture tools, and any application that collects email addresses. The API validates addresses at the point of entry, blocking invalid, disposable, and risky emails before they enter your database. Integration takes just a single API call with response times under 3 seconds.

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