Seznam.cz (Czech) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Seznam.cz (Czech) is the mailbox provider for 349 domains — 0.05% of 675,489 domains with MX records. Its strongest TLD is .cz (69.1% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What Seznam.cz (Czech) represents in this dataset
Czech consumer portal + mail, dominant in CZ.
Directory category: Mailbox. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about Seznam.cz (Czech)
Across 26 distinct TLDs its top three are .cz (69.1%), .com (8.6%), .eu (4.9%) — together 82.5% of the 349 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Mailchimp (ESP, 23 domains, 6.6% of them), followed by Heureka Mailing (CZ) (5.7%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Seznam.cz (Czech)
What else the same 349 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Seznam.cz (Czech) users |
|---|---|---|---|
| ESP | Mailchimp | 23 | 6.6% |
| ESP | Heureka Mailing (CZ) | 20 | 5.7% |
| ESP | SmartEmailing | 17 | 4.9% |
| ESP | Mailgun | 11 | 3.2% |
| ESP | SparkPost | 11 | 3.2% |
| ESP | Amazon SES | 7 | 2.0% |
| ESP | Mailkit | 4 | 1.1% |
| ESP | MailerLite | 4 | 1.1% |
| ESP | SendGrid (Twilio) | 3 | 0.9% |
| ESP | Mandrill | 3 | 0.9% |
TLD distribution (top 26 of 26)
Frequently asked questions
How many domains use Seznam.cz (Czech)?
349 domains in the Tranco top-1M use Seznam.cz (Czech) as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Seznam.cz (Czech)'s market share?
Seznam.cz (Czech) holds 0.05% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Seznam.cz (Czech)?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 349 domains.