SmartEmailing email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 18, 2026), SmartEmailing is the email service provider (ESP) for 444 domains — 0.07% of 637,944 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 444 domains in the Tranco top-1M use SmartEmailing (0.07% of SPF-publishing domains).
- Snapshot date: 2026-09-18 — recomputed every day.
- Strongest TLD: .cz (62.8% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: email service provider.
Why SmartEmailing appears in this category
SmartEmailing — Czech SMB email marketing platform.
We classify it as a email service provider from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
SmartEmailing is an email service provider (ESP) primarily serving smaller organisations and the regional European market, particularly in the Czech-speaking domain space. Like other ESPs, it provides sending infrastructure, and its presence is identifiable via SPF include records published by its customers.
The pattern of SmartEmailing's adoption—concentrated in smaller sites and frequently appearing alongside Microsoft 365 in corporate email stacks—shapes how it features in deliverability discussions. Because it occupies the long tail rather than the mainstream carrier tier, it carries less weight in the global email reputation ecosystem, but remains relevant for anyone receiving email from customers, partners, or employees in regions or segments where it is prevalent.
Where SmartEmailing sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 3 | 0.7% |
| Top 100,000 | 38 | 8.6% |
| Top 1,000,000 | 389 | 87.6% |
| Unranked | 14 | 3.2% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .cz | 279 | 62.8% | |
| .sk | 65 | 14.6% | |
| .com | 29 | 6.5% | |
| .eu | 16 | 3.6% | |
| .hu | 10 | 2.3% | |
| .pl | 8 | 1.8% | |
| .ro | 7 | 1.6% | |
| .net | 4 | 0.9% | |
| .de | 3 | 0.7% | |
| .fr | 2 | 0.5% |
What SmartEmailing users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 444 domains.
| Type | Service | Domains | Share of SmartEmailing users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 128 | 28.8% |
| Mailbox | Google Workspace | 90 | 20.3% |
| Mailbox | Self-Hosted | 67 | 15.1% |
| Mailbox | Unknown / Other | 58 | 13.1% |
| Mailbox | Seznam.cz (Czech) | 16 | 3.6% |
| Mailbox | Generic / unmatched (mx*.*) | 15 | 3.4% |
| ESP | SparkPost | 37 | 8.3% |
| ESP | Mailchimp | 35 | 7.9% |
| ESP | Heureka Mailing (CZ) | 24 | 5.4% |
| ESP | Mandrill | 15 | 3.4% |
Regional concentration and inbox placement asymmetry
SmartEmailing's strong footprint in the Czech domain space means that SPF/DKIM enforcement and reputation dynamics for its sending IP ranges may differ significantly from larger, globally distributed ESPs. Mailbox providers in regions where SmartEmailing is common may have tuned filtering rules or historical reputation signals specific to its infrastructure, whilst those outside the region may have minimal direct experience. This asymmetry can create blind spots for senders who conduct deliverability testing against a geographically weighted but globally-distributed sample of mailbox providers without weighting regional inboxes appropriately.
See the full SmartEmailing data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
Why does SmartEmailing appear in my SPF records, and should I be concerned?
SmartEmailing appears in SPF because your organisation uses or has used its sending service; you have authorised its IP ranges to send on your behalf via an SPF include mechanism. If you no longer use SmartEmailing, remove the include from your SPF record, as each additional include adds query complexity and can eventually cause SPF lookups to exceed the DNS query limit.
How many domains use SmartEmailing?
444 domains in the Tranco top-1M use SmartEmailing as their email service provider (ESP) as of September 18, 2026 (0.07% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is SmartEmailing common enough to affect email deliverability testing?
SmartEmailing accounts for 0.07% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Which countries or TLDs use SmartEmailing most?
SmartEmailing's largest TLD is .cz (62.8% of its domains); it appears across 28 TLDs in total.