Email domain
quick.cz email servers, SPF and DMARC
Mail for @quick.cz goes to smtp-in.quick.cz (MX priority 10), as DNS showed on 5 November 2026. The host sits under quick.cz. The domain publishes an SPF record ending in ~all and no DMARC record, which decide whether mail claiming to be from @quick.cz is trusted.
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quick.cz mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 10 | smtp-in.quick.cz | Not identified |
| SPF | v=spf1 ip4:194.228.2.91 ip4:194.228.2.92 ip4:194.228.41.112 ip4:160.218.169.68 a:aa.iol.cz ~all |
|---|---|
| DMARC | None published |
| MTA-STS | None published |
| TLS reporting | None published |
Read on 5 November 2026 with dig against 1.1.1.1 (8.8.8.8 as fallback); nothing sent to the mail servers. Check the records today with the email provider lookup.
quick.cz MX records
quick.cz publishes a single MX host, smtp-in.quick.cz. With no backup host, a sender that can't reach it queues the message and retries until the server answers or the queue gives up.
quick.cz SPF record
The record on 5 November 2026 was v=spf1 ip4:194.228.2.91 ip4:194.228.2.92 ip4:194.228.41.112 ip4:160.218.169.68 a:aa.iol.cz ~all.
In plain terms, lists 4 IP ranges directly. The top level uses 1 DNS-querying term; SPF allows 10 in total including nested includes (RFC 7208 §4.6.4).
It ends in a soft fail (~all): mail from unlisted servers should be accepted but treated as suspicious.
quick.cz DMARC policy
_dmarc.quick.cz returned no DMARC record on 5 November 2026. Receivers therefore get no instruction about mail that fails SPF and DKIM, which makes @quick.cz easier to spoof (RFC 7489).
Can you verify @quick.cz addresses?
Our checker treats @quick.cz like any domain: syntax, MX, disposable and role checks first, then a made-up address to rule out a catch-all, then your address at RCPT TO, disconnecting without sending. We have not published a test of how smtp-in.quick.cz answers for @quick.cz, so we make no claim here about whether single mailboxes can be confirmed; each result carries its own reason.
Cleaning a list with these addresses
DNS tells you where mail goes, not whether one person's mailbox still exists. For a list, run the whole file through a verifier before you send: invalid rows come out, risky rows (catch-all, unknown, refused) go in their own segment, and valid rows are safe to mail.
Common questions
- What are the MX records for quick.cz?
- On 5 November 2026:
smtp-in.quick.cz(priority 10). - Does quick.cz have SPF and DMARC?
- On 5 November 2026
quick.czpublished an SPF record ending in~alland no DMARC record. - Is quick.cz a disposable email domain?
- No.
quick.czis not on the disposable domain list our checker uses, so @quick.cz addresses are checked like any other mailbox. See the disposable domain checker for the list.
Free checks for @quick.cz lists
- Bulk email checker for a pasted list or CSV
- Verify a whole file with a reason for every row
- SPF lookup counter
- MTA-STS checker
- Disposable email checker
Another domain? See every email domain we have mapped and what our checker does at each mailbox provider.
Got a list with @quick.cz addresses?
Sign in with Google and the first 100 addresses are checked free: valid, risky and invalid, with the reason for each row and a file to download. No card. After that, plans start at $9/mo for 2,500 emails a month.
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