According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Maileroo is the email service provider (ESP) for 109 domains — 0.02% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
66.1% of its domains sit outside the top 100,000 — a long-tail footprint spread across smaller sites. It spans 41 TLDs, led by .com (38.5%) — a broad, internationally distributed base. The service most often seen alongside it is Generic / unmatched (mx*.*) (mailbox provider), on 22.0% of its domains.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 13 | 11.9% |
| Top 1,000,000 | 72 | 66.1% |
| Unranked | 24 | 22.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 42 | 38.5% | |
| .net | 6 | 5.5% | |
| .io | 5 | 4.6% | |
| .de | 5 | 4.6% | |
| .org | 4 | 3.7% | |
| .com.au | 4 | 3.7% | |
| .mx | 3 | 2.8% | |
| .co.uk | 3 | 2.8% | |
| .app | 2 | 1.8% | |
| .club | 2 | 1.8% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 109 domains.
| Type | Service | Domains | Share of Maileroo users |
|---|---|---|---|
| Mailbox | Generic / unmatched (mx*.*) | 24 | 22.0% |
| Mailbox | Google Workspace | 20 | 18.3% |
| Mailbox | Self-Hosted | 13 | 11.9% |
| Mailbox | Microsoft 365 | 10 | 9.2% |
| Mailbox | Cloudflare Email Routing | 7 | 6.4% |
| Mailbox | Zoho Mail (EU) | 6 | 5.5% |
| ESP | Mailjet (Sinch) | 13 | 11.9% |
| ESP | Cloudflare Email Routing | 7 | 6.4% |
| ESP | Mailgun | 5 | 4.6% |
| ESP | Zoho Mail EU (sender) | 5 | 4.6% |
See the full Maileroo data page (KPI cards, trend, sample domains) →
109 domains in the Tranco top-1M use Maileroo 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.
Maileroo 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.
Maileroo's largest TLD is .com (38.5% of its domains); it appears across 41 TLDs in total.