According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Cuenote is the email service provider (ESP) for 465 domains — 0.08% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Cuenote is an email service provider whose SPF configuration is prevalent across the internet's smaller and medium-tier websites rather than the largest global brands. Its presence spans internationally across multiple country-code and generic domains, with .com as the dominant top-level domain.
The frequent co-occurrence of Cuenote SPF includes alongside Microsoft 365 authentication suggests a shared deployment pattern. For deliverability professionals evaluating email authentication chains across diverse sender populations, recognising Cuenote in SPF records is important: when it appears alongside Microsoft 365 or other providers, DNS query-limit constraints and potential qualifier conflicts require careful review to ensure proper alignment.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 2 | 0.4% |
| Top 10,000 | 5 | 1.1% |
| Top 100,000 | 76 | 16.3% |
| Top 1,000,000 | 364 | 78.3% |
| Unranked | 18 | 3.9% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 171 | 36.8% | |
| .co.jp | 87 | 18.7% | |
| .jp | 77 | 16.6% | |
| .de | 29 | 6.2% | |
| .or.jp | 18 | 3.9% | |
| .co.uk | 9 | 1.9% | |
| .org | 7 | 1.5% | |
| .ac.jp | 5 | 1.1% | |
| .net | 5 | 1.1% | |
| .hu | 4 | 0.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 465 domains.
| Type | Service | Domains | Share of Cuenote users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 181 | 38.9% |
| Mailbox | Google Workspace | 65 | 14.0% |
| Mailbox | Self-Hosted | 60 | 12.9% |
| Mailbox | Unknown / Other | 44 | 9.5% |
| Mailbox | SecureMX (JP) | 24 | 5.2% |
| Mailbox | Mimecast | 15 | 3.2% |
| ESP | Amazon SES | 123 | 26.5% |
| ESP | Salesforce | 46 | 9.9% |
| ESP | HubSpot | 39 | 8.4% |
| ESP | Zendesk | 29 | 6.2% |
Cuenote SPF includes frequently appear in authentication stacks that also include Microsoft 365, reflecting a common pattern in which organisations use both services. When both sit in the same SPF record, the combined length and nesting can approach DNS query limits, and conflicting qualifier chains may cause unexpected softfail or fail results at receivers that enforce strict alignment rules.
See the full Cuenote data page (KPI cards, trend, sample domains) →
Cuenote is an email service provider used by smaller to mid-market organisations; its presence in SPF indicates that sender is using it for email delivery. When seen alongside Microsoft 365, verify that both authentication mechanisms align correctly.
465 domains in the Tranco top-1M use Cuenote as their email service provider (ESP) as of July 13, 2026 (0.08% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Cuenote accounts for 0.08% 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.
Cuenote's largest TLD is .com (36.8% of its domains); it appears across 48 TLDs in total.