Is email.cz a valid email domain?
Mail for email.cz is handled by 2 servers, with mx1.seznam.cz tried first.
It is a free, public mailbox provider, and it is not on our disposable list.
SPF is published and ends with ?all. DMARC is set to none.
Check an email address at email.cz
Type the name before the @ to check a full address. No account needed.
MX records
| Priority | Mail server | Resolves to |
|---|---|---|
| 5 | mx1.seznam.cz | 77.75.77.90, 2a02:598:2::1090 |
| 10 | mx2.seznam.cz | 77.75.77.42, 2a02:598:2::1042 |
SPF
Record published
v=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all
DMARC
Policy: none
v=DMARC1; p=none; rua=mailto:abuse@seznam.cz; fo=d; ruf=mailto:abuse@seznam.cz
Disposable?
No, not on our disposable list.
Free provider?
Yes, a free public mailbox provider.
What this means for your email list
Is a free-provider address a problem?
Addresses at email.cz are legitimate and deliverable in general. What goes wrong is the mailbox part before the @: typos, old accounts and abandoned inboxes. That is what per-address verification catches.
Sender authentication
email.cz has DMARC in monitoring mode (p=none). It collects reports but does not yet block spoofed mail, so the domain is easier to impersonate.
✨ Report summary
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Sign up to get a report summary →Frequently asked questions
- Is email.cz a valid email domain?
- Yes. email.cz publishes 2 MX records and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is email.cz a disposable email domain?
- No. email.cz is not on our disposable list, but it is a free public provider. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for email.cz?
- mx1.seznam.cz (priority 5); mx2.seznam.cz (priority 10).
- Does email.cz have SPF and DMARC?
- SPF: yes, ending ?all. DMARC: yes, policy none.