Yes. You can verify any @Atlas.cz address in real time with a direct SMTP handshake that provides 99.7% accuracy. Atlas.cz is operated by Atlas.cz, runs 4 mail servers, enforces 3 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.
atlas.cz publishes 4 MX records. The primary mail exchanger is atlas-cz-10mx2.eco-mx.cz, hosted by eco-mx.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 |
|---|---|---|---|
| 10 | atlas-cz-10mx2.eco-mx.cz | 46.255.227.8 | Reachable |
| 10 | atlas-cz-10mx1.eco-mx.cz | 46.255.225.8 | Reachable |
| 20 | atlas-cz-20mx1.eco-mx.cz | 46.255.227.8 | Reachable |
| 20 | atlas-cz-20mx2.eco-mx.cz | 46.255.225.8 | Reachable |
220 antispam83.centrum.cz ESMTPYes. atlas.cz is a valid email provider, operated by Atlas.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 Atlas.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 atlas.cz mailboxes before you mail them.
Mistyped atlas.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 atlas.cz addresses raises every rate that matters: opens, clicks, and replies.
Atlas.cz is Atlas.cz, registered through REG-WEDOS and first seen Jan 12, 1997.
atlas.cz is a Czech email and web portal service operated by Atlas.cz, one of the early internet portals in the Czech Republic. The platform offers free email accounts along with search, news, and directory services primarily for Czech-speaking users. Atlas.cz has been a recognized name in the Czech internet landscape since the late 1990s.
atlas.cz supports SPF authentication for outbound email validation. DKIM and DMARC implementation follows the provider's infrastructure standards. As a Czech internet service, atlas.cz complies with EU data protection regulations and applies standard anti-spam filtering to protect its user base.
The atlas.cz mail servers perform recipient verification and will reject messages addressed to nonexistent accounts. The service does not operate as a catch-all domain. Senders may encounter rate limiting when delivering high volumes of messages to atlas.cz addresses from unfamiliar IP ranges.
When sending to atlas.cz recipients, ensure your sending infrastructure supports SPF and DKIM authentication. Czech email services generally respond well to properly authenticated mail with clear sender identification. Maintain clean lists and process bounce notifications promptly to sustain good deliverability.
Upload a CSV or TXT list of Atlas.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 Atlas.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, atlas.cz is a valid free email domain operated by Atlas.cz. It provides permanent email accounts to users.
No, atlas.cz is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
atlas.cz uses mail servers operated by Atlas.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 atlas.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 atlas.cz's mail servers, the same engine that has verified billions of addresses since 2012.
Other free email provider domains we have audited.