According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), FORPSI (Internet CZ) is the mailbox provider for 211 domains — 0.03% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
FORPSI (Internet CZ) is a Czech mailbox provider, primarily serving small-to-medium-sized sites in the Czech Republic. It appears as a primary MX record across a long-tail, regionally concentrated footprint.
Because FORPSI is concentrated in the .cz space and frequently paired with SmartEmailing—a Czech email marketing and CRM platform—its presence in your send logs typically indicates you are reaching organisations within the Czech email ecosystem. For senders targeting Czech recipients, FORPSI merits monitoring; for those with no Czech footprint, it is seldom a strategic concern.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 8 | 3.8% |
| Top 1,000,000 | 156 | 73.9% |
| Unranked | 47 | 22.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .cz | 116 | 55.0% | |
| .hu | 25 | 11.8% | |
| .com | 24 | 11.4% | |
| .sk | 17 | 8.1% | |
| .eu | 8 | 3.8% | |
| .net | 7 | 3.3% | |
| .pl | 4 | 1.9% | |
| .ro | 2 | 0.9% | |
| .org | 2 | 0.9% | |
| .link | 1 | 0.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 211 domains.
| Type | Service | Domains | Share of FORPSI (Internet CZ) users |
|---|---|---|---|
| ESP | SmartEmailing | 11 | 5.2% |
| ESP | Mailkit | 10 | 4.7% |
| ESP | SparkPost | 9 | 4.3% |
| ESP | Mailchimp | 5 | 2.4% |
| ESP | Heureka Mailing (CZ) | 4 | 1.9% |
| ESP | Mailgun | 3 | 1.4% |
| ESP | Amazon SES | 3 | 1.4% |
| ESP | MailerSend | 3 | 1.4% |
| ESP | SendGrid (Twilio) | 3 | 1.4% |
| ESP | Mandrill | 2 | 0.9% |
FORPSI's footprint correlates strongly with SmartEmailing adoption, suggesting it is part of a Czech email and customer-relationship-management ecosystem. This means reputation issues or filtering changes affecting one platform can propagate to the other. Senders should treat FORPSI monitoring and reputation management as tied to broader Czech email-marketing infrastructure rather than as an isolated regional ISP.
See the full FORPSI (Internet CZ) data page (KPI cards, trend, sample domains) →
If your audience includes organisations or small businesses in the Czech Republic, FORPSI testing should be part of your regional coverage. For campaigns with no Czech-focused targeting, FORPSI is unlikely to be a priority.
211 domains in the Tranco top-1M use FORPSI (Internet CZ) as their mailbox provider as of July 13, 2026 (0.03% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
FORPSI (Internet CZ) accounts for 0.03% of domains with MX records 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.
FORPSI (Internet CZ)'s largest TLD is .cz (55.0% of its domains); it appears across 15 TLDs in total.