ReSender (RU) email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), ReSender (RU) is the email service provider (ESP) for 130 domains — 0.02% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 130 domains in the Tranco top-1M use ReSender (RU) (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .ru (64.6% of its domains).
- Most co-used service: Yandex 360.
- Directory category: email service provider.
Why ReSender (RU) appears in this category
ReSender — Russian email distribution 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.
ReSender (RU) is an email service provider concentrated in the Russian (.ru) domain space, identifiable through SPF include records in the outbound mail infrastructure of smaller websites and regional businesses. It is most often deployed alongside Yandex 360, Russia's dominant email platform, suggesting either integrated or complementary mail handling common to Eastern European infrastructure.
For email professionals testing deliverability or analysing sender reputation, ReSender (RU)'s presence indicates a specific mail topology: organisations delegating message sending to a Russian-focused ESP rather than managing independent mail reputation. This distinction is relevant when tracing mail paths, understanding SPF authentication chains, or predicting acceptance rates across geographically and provider-diverse sender populations.
Where ReSender (RU) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 17 | 13.1% |
| Top 1,000,000 | 113 | 86.9% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .ru | 84 | 64.6% | |
| .com | 14 | 10.8% | |
| .pro | 4 | 3.1% | |
| .io | 3 | 2.3% | |
| .xn--p1ai | 2 | 1.5% | |
| .mobi | 2 | 1.5% | |
| .travel | 1 | 0.8% | |
| .red | 1 | 0.8% | |
| .su | 1 | 0.8% | |
| .site | 1 | 0.8% |
What ReSender (RU) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 130 domains.
| Type | Service | Domains | Share of ReSender (RU) users |
|---|---|---|---|
| Mailbox | Yandex 360 | 48 | 36.9% |
| Mailbox | Self-Hosted | 25 | 19.2% |
| Mailbox | Mail.ru for Business | 20 | 15.4% |
| Mailbox | Generic / unmatched (mx*.*) | 12 | 9.2% |
| Mailbox | Timeweb (RU) | 5 | 3.8% |
| Mailbox | Beget (RU) | 4 | 3.1% |
| ESP | Unisender (RU) | 25 | 19.2% |
| ESP | UniSender | 10 | 7.7% |
| ESP | SendPulse | 7 | 5.4% |
| ESP | DashaMail (RU) | 6 | 4.6% |
SPF inheritance and reputation distribution in regional mail flows
When ReSender (RU) appears in an SPF record, it signifies that the sending organisation's mail reputation is linked to the ESP's shared infrastructure. The frequent pairing of ReSender (RU) with Yandex 360 in SPF chains reflects a particular mail topology common to Eastern European hosting and reseller markets. Because reputation is pooled at the provider layer, messages routed through ReSender (RU) may encounter different filtering rules or acceptance thresholds at receiving systems than messages from independent senders or global ESPs, a consideration for anyone benchmarking cross-regional mail acceptance.
See the full ReSender (RU) data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is ReSender (RU) and why does it appear in email SPF records?
ReSender (RU) is an email service provider whose infrastructure is declared via SPF includes by organisations in the Russian domain space. Its appearance in an SPF record means the sender has authorised this provider to transmit email on their behalf.
How many domains use ReSender (RU)?
130 domains in the Tranco top-1M use ReSender (RU) as their email service provider (ESP) as of September 12, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is ReSender (RU) common enough to affect email deliverability testing?
ReSender (RU) accounts for 0.02% 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 ReSender (RU) most?
ReSender (RU)'s largest TLD is .ru (64.6% of its domains); it appears across 27 TLDs in total.