According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Hornetsecurity is the mailbox provider for 1,449 domains — 0.22% of 658,108 domains with MX records. Detection method: primary MX record (lowest preference).
Hornetsecurity is a hosted email platform that provides mailbox hosting and inbound email security services to organisations. It operates as a multi-tenant service rather than a consumer email offering.
Hornetsecurity's deployment pattern clusters in small to mid-market organisations, particularly in German-speaking regions, though it is used internationally across diverse TLDs. This distribution — numerous but individually modest in scale — has deliverability implications: because many smaller organisations share the platform, its collective reputation and filtering logic differ from both the hyperscale inboxes and single-organisation mail systems. For senders, this means Hornetsecurity warrants dedicated testing attention, particularly when targeting organisations in Europe.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 7 | 0.5% |
| Top 100,000 | 107 | 7.4% |
| Top 1,000,000 | 1,151 | 79.4% |
| Unranked | 183 | 12.6% |
| TLD | Domains | Share | |
|---|---|---|---|
| .de | 580 | 40.0% | |
| .com | 390 | 26.9% | |
| .fr | 108 | 7.5% | |
| .co.uk | 39 | 2.7% | |
| .org | 36 | 2.5% | |
| .es | 36 | 2.5% | |
| .net | 33 | 2.3% | |
| .at | 28 | 1.9% | |
| .ca | 16 | 1.1% | |
| .ch | 15 | 1.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,449 domains.
| Type | Service | Domains | Share of Hornetsecurity users |
|---|---|---|---|
| ESP | Hornetsecurity | 1,082 | 74.7% |
| ESP | Mailjet (Sinch) | 121 | 8.4% |
| ESP | Amazon SES | 119 | 8.2% |
| ESP | Constant Contact | 80 | 5.5% |
| ESP | Brevo (ex-Sendinblue) | 74 | 5.1% |
| ESP | HubSpot | 63 | 4.3% |
| ESP | Mailchimp | 63 | 4.3% |
| ESP | Salesforce | 61 | 4.2% |
| ESP | SendGrid (Twilio) | 59 | 4.1% |
| ESP | Zendesk | 59 | 4.1% |
As a hosted platform serving many smaller organisations simultaneously, Hornetsecurity's inbound filtering and reputation scoring reflect the aggregate security posture of its entire customer base. This differs from testing against a single organisation's mail server or a hyperscale consumer inbox; a sender's deliverability at Hornetsecurity is influenced both by their own domain reputation and by how the platform evaluates traffic patterns across all its tenants. This multi-tenant dynamic means sender authentication and sending patterns must account for provider-level filtering in addition to recipient-organisation policies.
See the full Hornetsecurity data page (KPI cards, trend, sample domains) →
Yes — its widespread deployment across European mid-market organisations makes it a material audience. Its filtering and reputation practices, shaped by many smaller senders and organisations, often reveal issues that hyperscale-focused testing misses.
1,449 domains in the Tranco top-1M use Hornetsecurity as their mailbox provider as of July 12, 2026 (0.22% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Hornetsecurity accounts for 0.22% of domains with MX records 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.
Hornetsecurity's largest TLD is .de (40.0% of its domains); it appears across 74 TLDs in total.