UniSender email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), UniSender is the email service provider (ESP) for 689 domains — 0.11% of 631,089 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 689 domains in the Tranco top-1M use UniSender (0.11% of SPF-publishing domains).
- Snapshot date: 2026-09-11 — recomputed every day.
- Strongest TLD: .ru (65.0% of its domains).
- Most co-used service: Yandex 360.
- Directory category: email service provider.
Why UniSender appears in this category
UniSender — CIS 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.
UniSender is a Russian email service provider offering bulk email, marketing automation, and transactional mail services. It serves primarily businesses within the Russian and post-Soviet markets.
In SPF records across the web, UniSender appears predominantly amongst smaller and mid-market organisations rather than global enterprises. Its footprint overlaps significantly with Yandex 360, suggesting that Russian businesses often adopt both services as part of their email infrastructure stack. For email operators and receivers, this means UniSender's reputation sits within a specific regional and organisational-size category distinct from Western-focused ESPs.
Where UniSender sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 8 | 1.2% |
| Top 100,000 | 105 | 15.2% |
| Top 1,000,000 | 573 | 83.2% |
| Unranked | 2 | 0.3% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .ru | 448 | 65.0% | |
| .com | 89 | 12.9% | |
| .by | 17 | 2.5% | |
| .io | 11 | 1.6% | |
| .pro | 10 | 1.5% | |
| .net | 9 | 1.3% | |
| .org | 8 | 1.2% | |
| .kz | 5 | 0.7% | |
| .online | 5 | 0.7% | |
| .market | 4 | 0.6% |
What UniSender users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 689 domains.
| Type | Service | Domains | Share of UniSender users |
|---|---|---|---|
| Mailbox | Yandex 360 | 283 | 41.1% |
| Mailbox | Self-Hosted | 132 | 19.2% |
| Mailbox | Mail.ru for Business | 60 | 8.7% |
| Mailbox | Google Workspace | 58 | 8.4% |
| Mailbox | Unknown / Other | 17 | 2.5% |
| Mailbox | Generic / unmatched (mx*.*) | 15 | 2.2% |
| ESP | Unisender (RU) | 178 | 25.8% |
| ESP | UniOne | 57 | 8.3% |
| ESP | DashaMail (RU) | 50 | 7.3% |
| ESP | SendPulse | 48 | 7.0% |
Regional co-deployment with Yandex 360
UniSender frequently appears in SPF records alongside Yandex 360, Yandex's business email suite. This dual-provider pattern is specific to Russian and post-Soviet markets and reflects how organisations in the region consolidate email infrastructure. Mailbox providers with region-specific reputation models may evaluate mail from this stack using criteria distinct from those applied to standalone Western ESPs.
See the full UniSender data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email deliverability against UniSender?
UniSender is used primarily by smaller and mid-market organisations in Russian and Russian-speaking regions. Test against it if your recipients are based in or operate within that geography; otherwise it has minimal relevance to your campaign's overall deliverability footprint.
How many domains use UniSender?
689 domains in the Tranco top-1M use UniSender as their email service provider (ESP) as of September 11, 2026 (0.11% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is UniSender common enough to affect email deliverability testing?
UniSender accounts for 0.11% 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 UniSender most?
UniSender's largest TLD is .ru (65.0% of its domains); it appears across 63 TLDs in total.