According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), ReSender (RU) is the email service provider (ESP) for 119 domains — 0.02% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
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.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 20 | 16.8% |
| Top 1,000,000 | 89 | 74.8% |
| Unranked | 10 | 8.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .ru | 75 | 63.0% | |
| .com | 14 | 11.8% | |
| .pro | 5 | 4.2% | |
| .io | 3 | 2.5% | |
| .xn--p1ai | 2 | 1.7% | |
| .mobi | 2 | 1.7% | |
| .online | 1 | 0.8% | |
| .org | 1 | 0.8% | |
| .info | 1 | 0.8% | |
| .to | 1 | 0.8% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 119 domains.
| Type | Service | Domains | Share of ReSender (RU) users |
|---|---|---|---|
| Mailbox | Yandex 360 | 42 | 35.3% |
| Mailbox | Self-Hosted | 27 | 22.7% |
| Mailbox | Mail.ru for Business | 16 | 13.4% |
| Mailbox | Generic / unmatched (mx*.*) | 12 | 10.1% |
| Mailbox | Google Workspace | 4 | 3.4% |
| Mailbox | Beget (RU) | 4 | 3.4% |
| ESP | Unisender (RU) | 26 | 21.8% |
| ESP | UniSender | 9 | 7.6% |
| ESP | SendPulse | 9 | 7.6% |
| ESP | DashaMail (RU) | 6 | 5.0% |
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) →
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.
119 domains in the Tranco top-1M use ReSender (RU) as their email service provider (ESP) as of July 13, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
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.
ReSender (RU)'s largest TLD is .ru (63.0% of its domains); it appears across 24 TLDs in total.