Email domain
post.sk email servers, SPF and DMARC
Mail for @post.sk goes to pp-sk-10mx1.eco-mx.cz (MX priority 10) and 3 backup hosts, as DNS showed on 5 November 2026. The host sits under eco-mx.cz. The domain publishes an SPF record ending in ~all and a DMARC policy of p=none, which decide whether mail claiming to be from @post.sk is trusted.
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post.sk mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 10 | pp-sk-10mx1.eco-mx.cz | Not identified |
| 10 | pp-sk-10mx2.eco-mx.cz | Not identified |
| 20 | pp-sk-20mx1.eco-mx.cz | Not identified |
| 20 | pp-sk-20mx2.eco-mx.cz | Not identified |
| SPF | v=spf1 include:_spf.centrum.cz ~all include:mailgun.org ~all |
|---|---|
| DMARC | v=DMARC1; p=none |
| 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.
post.sk MX records
post.sk publishes 4 MX hosts; senders try the lowest priority number first (pp-sk-10mx1.eco-mx.cz, 10) and fall back to the others in order.
6 other domains we checked on the same day also route mail to hosts under eco-mx.cz, with different records from post.sk: atlas.cz, centrum.cz, centrum.sk, net.hr, pobox.sk and volny.cz.
post.sk SPF record
The record on 5 November 2026 was v=spf1 include:_spf.centrum.cz ~all include:mailgun.org ~all.
In plain terms, it delegates to _spf.centrum.cz and mailgun.org. The top level uses 2 DNS-querying terms; 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.
post.sk DMARC policy
The record is v=DMARC1; p=none.
p=none only asks for reports; failing mail is delivered as normal.
Can you verify @post.sk addresses?
Our checker treats @post.sk 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 pp-sk-10mx1.eco-mx.cz answers for @post.sk, 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 post.sk?
- On 5 November 2026:
pp-sk-10mx1.eco-mx.cz(priority 10),pp-sk-10mx2.eco-mx.cz(priority 10),pp-sk-20mx1.eco-mx.cz(priority 20),pp-sk-20mx2.eco-mx.cz(priority 20). - Does post.sk have SPF and DMARC?
- On 5 November 2026
post.skpublished an SPF record ending in~alland a DMARC policy ofp=none. - Is post.sk a disposable email domain?
- No.
post.skis not on the disposable domain list our checker uses, so @post.sk addresses are checked like any other mailbox. See the disposable domain checker for the list.
Free checks for @post.sk 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 @post.sk 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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