According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Zoho ZeptoMail is the email service provider (ESP) for 2,629 domains — 0.43% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Zoho ZeptoMail is Zoho Corporation's transactional email service, designed to relay application-driven messages—account confirmations, password resets, notifications, and reports—via SMTP. Zoho Corporation is an Indian software company whose business productivity suite spans email, CRM, finance, and office tools.
ZeptoMail's footprint in mail infrastructure skews toward smaller and mid-market organisations, particularly in the .com namespace, rather than enterprise-scale senders. It appears frequently paired with Google Workspace, suggesting adoption among cost-conscious businesses consolidating cloud tools. For senders, ZeptoMail's SPF includes mark a domain as reliant on a lightweight, self-hosted ESP; for receivers and reputation systems, this pattern signals smaller mail volume and newer sender history, warranting closer scrutiny of list quality and authentication rigour.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 24 | 0.9% |
| Top 100,000 | 281 | 10.7% |
| Top 1,000,000 | 2,074 | 78.9% |
| Unranked | 250 | 9.5% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 1,577 | 60.0% | |
| .org | 83 | 3.2% | |
| .in | 71 | 2.7% | |
| .co.uk | 66 | 2.5% | |
| .net | 61 | 2.3% | |
| .io | 49 | 1.9% | |
| .de | 47 | 1.8% | |
| .com.au | 42 | 1.6% | |
| .co.za | 33 | 1.3% | |
| .com.br | 30 | 1.1% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 2,629 domains.
| Type | Service | Domains | Share of Zoho ZeptoMail users |
|---|---|---|---|
| Mailbox | Google Workspace | 1,099 | 41.8% |
| Mailbox | Microsoft 365 | 850 | 32.3% |
| Mailbox | Self-Hosted | 127 | 4.8% |
| Mailbox | Zoho Mail | 105 | 4.0% |
| Mailbox | Unknown / Other | 80 | 3.0% |
| Mailbox | Mimecast | 48 | 1.8% |
| ESP | Zoho Campaigns | 801 | 30.5% |
| ESP | Amazon SES | 452 | 17.2% |
| ESP | Zoho Mail 360 | 301 | 11.4% |
| ESP | SendGrid (Twilio) | 300 | 11.4% |
Because ZeptoMail attracts startups and SMBs, the service carries higher concentrations of newly-registered domains and lower sender volumes than tier-one ESPs. Mailbox providers and inbox operators monitor this segment carefully: a ZeptoMail SPF include often correlates with minimal sending history and smaller organisational footprint, neither inherently disqualifying nor credible. Senders on the platform should prioritise rigorous SPF, DKIM, and DMARC setup, consistent authentication across all sending infrastructure, prompt feedback-loop processing, and aggressive list hygiene. The reputation penalty for poor practices on ZeptoMail is sharper than for established senders on major platforms, precisely because the baseline expectation for authentication and list quality is higher in the long tail.
See the full Zoho ZeptoMail data page (KPI cards, trend, sample domains) →
Yes, particularly if your recipient base includes SMBs, Google Workspace users, or organisations in emerging markets; ZeptoMail's presence is too common to ignore, though not as critical as testing major ISPs like Gmail or Microsoft. Include it as part of a geography- and business-type-representative sample.
2,629 domains in the Tranco top-1M use Zoho ZeptoMail as their email service provider (ESP) as of July 13, 2026 (0.43% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Zoho ZeptoMail accounts for 0.43% 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.
Zoho ZeptoMail has been stable — its share moved +0.01 pp over the last 30 days (as of July 13, 2026).
Zoho ZeptoMail's largest TLD is .com (60.0% of its domains); it appears across 168 TLDs in total.