centrum.cz - Email Domain Verification & Deliverability Report

Active Free Email Provider
Organization: Centrum Holdings
Mail Server: eco-mx.cz
Verified 3 days ago

Real-time verification data for Centrum Holdings (centrum.cz). A Free Email Provider .

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MX Records for centrum.cz

PriorityMail ServerIP Address
10 centrum-cz-10mx2.eco-mx.cz 46.255.227.8
10 centrum-cz-10mx1.eco-mx.cz 46.255.225.8
20 centrum-cz-20mx2.eco-mx.cz 46.255.225.8
20 centrum-cz-20mx1.eco-mx.cz 46.255.227.8
SMTP Status: Responding
SMTP Banner:
220 antispam90.centrum.cz ESMTP

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

Email Authentication for centrum.cz

SPF Record Pass

v=spf1 redirect=_spf.centrum.cz

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

DMARC Record None

v=DMARC1; p=none; rua=mailto:dmarc@centrum.cz; ruf=mailto:dmarcf@centrum.cz

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

DKIM Found

DKIM signatures were detected for centrum.cz, confirming that this domain cryptographically signs outgoing emails.

Authentication Summary: centrum.cz has full email authentication configured with SPF, DMARC, and DKIM. This provides strong protection against email spoofing and phishing. Emails sent from this domain are well-authenticated and likely to have high deliverability.

WHOIS & Domain Information

Registration Details

Domain
centrum.cz
TLD
.cz
Created
1997-07-12
Updated
2025-02-12
Expires
2026-10-24
Domain Age
28 years

Registrar

Name
REG-CZNIC

Registrant Contact

Name
Economia, a.s.
Organization
Economia, a.s.
Location
Praha 7, 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

  • max.ns.cloudflare.com
  • pam.ns.cloudflare.com

About centrum.cz Email Verification

centrum.cz is a Czech email and internet portal operated by Centrum Holdings, a Czech digital media company. The platform has been one of the prominent Czech web portals since the late 1990s, offering free email, search, and content services to Czech-speaking users. Centrum.cz email provides standard webmail features with spam filtering and mobile access.

centrum.cz supports SPF authentication for outbound email and publishes DNS records for sender validation. DKIM and DMARC policies are implemented according to the platform's infrastructure standards. The service complies with EU data protection regulations (GDPR) and applies Czech-market-appropriate anti-spam filtering.

The centrum.cz mail servers perform recipient verification and reject messages to nonexistent addresses at the SMTP level. The domain does not function as a catch-all. Rate limiting may be applied to inbound connections from senders without established reputation with Czech email infrastructure.

When emailing centrum.cz users, authenticate your domain with SPF and DKIM records. Czech email providers respond well to properly formatted messages with clear sender identification. Maintain clean mailing lists, include unsubscribe mechanisms, and ensure compliance with EU anti-spam regulations for best deliverability.

How to Verify centrum.cz Email Addresses

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Verify centrum.cz Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates centrum.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, centrum.cz is a valid free email domain operated by Centrum Holdings. It provides permanent email accounts to users.
No, centrum.cz is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
centrum.cz uses mail servers operated by Centrum Holdings. 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 centrum.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 centrum.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 centrum.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 centrum.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 centrum.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 centrum.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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