According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), DocuClass SaaS is the SaaS sender for 222 domains — 0.04% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
DocuClass SaaS is a mail delivery platform enabling domains to outsource email sending through its infrastructure. The service provides email authentication and routing mechanisms, allowing organisations to delegate outbound mail whilst maintaining sender reputation.
In scanning email infrastructure across the internet, DocuClass appears predominantly in the long tail of smaller and regional websites, with notable concentration amongst Polish-registered domains. This pattern reflects its adoption by mid-market and niche organisations rather than the largest global brands. For email senders, using DocuClass means SPF records will include its authentication mechanisms; for receivers, seeing such includes during authentication audits is routine for smaller websites and carries no deliverability concern.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 4 | 1.8% |
| Top 1,000,000 | 162 | 73.0% |
| Unranked | 56 | 25.2% |
| TLD | Domains | Share | |
|---|---|---|---|
| .pl | 186 | 83.8% | |
| .com | 14 | 6.3% | |
| .eu | 7 | 3.2% | |
| .com.pl | 5 | 2.3% | |
| .online | 2 | 0.9% | |
| .expert | 1 | 0.5% | |
| .club | 1 | 0.5% | |
| .one | 1 | 0.5% | |
| .net | 1 | 0.5% | |
| .pro | 1 | 0.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 222 domains.
| Type | Service | Domains | Share of DocuClass SaaS users |
|---|---|---|---|
| Mailbox | Unknown / Other | 151 | 68.0% |
| Mailbox | Google Workspace | 34 | 15.3% |
| Mailbox | Self-Hosted | 10 | 4.5% |
| Mailbox | dPoczta (PL) | 7 | 3.2% |
| Mailbox | Microsoft 365 | 6 | 2.7% |
| Mailbox | Zenbox / cyber_Folks (PL) | 4 | 1.8% |
DocuClass uses SPF include mechanisms to authenticate mail sent on a domain's behalf, a standard approach for third-party delivery platforms. Its concentration in Polish domains and smaller websites reflects a common market segmentation: regional and emerging-market mail platforms typically serve organisations too small for enterprise solutions yet too large for in-house infrastructure. When a DocuClass include appears in authentication records, it signals the domain owner has chosen outsourced delivery—an operational choice, not a security risk or deliverability red flag, and reflects normal infrastructure segmentation in the mid-market and regional space.
See the full DocuClass SaaS data page (KPI cards, trend, sample domains) →
It means that domain has delegated outbound mail sending to DocuClass SaaS, which authenticates via SPF includes to send email on the domain's behalf. This is a routine configuration choice for organisations using their platform and does not indicate misconfiguration or deliverability issues.
222 domains in the Tranco top-1M use DocuClass SaaS as their SaaS sender as of July 13, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
DocuClass SaaS accounts for 0.04% 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.
DocuClass SaaS's largest TLD is .pl (83.8% of its domains); it appears across 13 TLDs in total.