Yes. You can verify any @Email.cz address in real time with a direct SMTP handshake that provides 99.7% accuracy. Email.cz is operated by Seznam.cz, runs 2 mail servers, enforces 2 of 3 authentication standards, and is currently responding to SMTP.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
email.cz publishes 2 MX records. The primary mail exchanger is mx1.seznam.cz, hosted by seznam.cz, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 5 | mx1.seznam.cz | 77.75.77.90 | Reachable |
| 10 | mx2.seznam.cz | 77.75.77.42 | Reachable |
220 email.seznam.cz ESMTPYes. email.cz is a valid email provider, operated by Seznam.cz. Addresses are persistent and real mail reaches a genuine recipient. Individual mailboxes still go stale, so verify each one before you send.
A live SMTP handshake connects to Email.cz's mail server and asks whether the mailbox exists using the RCPT TO command, without ever transmitting a message. The recipient never sees the check.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
Free inboxes get abandoned constantly. Verification drops the dead email.cz mailboxes before you mail them.
Mistyped email.cz addresses fail a real SMTP check, so they never turn into a hard bounce.
A clean list keeps your bounce rate low, and a low bounce rate is what protects inbox placement on a big send.
Mailing only live email.cz addresses raises every rate that matters: opens, clicks, and replies.
Email.cz is Seznam.cz, registered through REG-CZNIC and first seen Nov 17, 1997.
email.cz is a Czech email service operated by Seznam.cz, the largest Czech internet company and search engine. Seznam.cz provides a wide range of online services to Czech users, and email.cz is one of several email domains in its portfolio. The service offers free webmail with spam filtering, calendar integration, and mobile access for Czech-speaking users.
email.cz benefits from Seznam.cz's robust email infrastructure, supporting SPF, DKIM, and DMARC authentication for outbound messages. Seznam.cz maintains strong anti-spam and anti-phishing measures and complies with EU data protection regulations (GDPR). The platform actively monitors for abuse across its email domains.
The email.cz mail servers enforce strict recipient verification, rejecting messages to nonexistent addresses at the SMTP level. The domain does not operate as a catch-all. Seznam.cz applies reputation-based rate limiting on inbound connections and may defer messages from senders with low or unknown reputation.
For effective delivery to email.cz addresses, authenticate your sending domain with SPF, DKIM, and DMARC. Seznam.cz responds well to properly configured sending infrastructure. Maintain clean lists, process bounces promptly, and comply with EU anti-spam regulations for consistent deliverability to Czech email users.
Upload a CSV or TXT list of Email.cz addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Email.cz address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
Yes, email.cz is a valid free email domain operated by Seznam.cz. It provides permanent email accounts to users.
No, email.cz is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
email.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 email.cz addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with email.cz's mail servers, the same engine that has verified billions of addresses since 2012.
Other free email provider domains we have audited.