According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Strato (DE) is the mailbox provider for 1,126 domains — 0.17% of 658,108 domains with MX records. Detection method: primary MX record (lowest preference).
Strato is a German email and web hosting provider operating primarily within the .de namespace, serving small-to-medium businesses with mailbox infrastructure and related services.
Strato's concentration in the long tail of smaller sites—rather than among global megaplatforms—means email traffic involving Strato reflects regional, dispersed sender profiles where domain authentication signals and local sender history often carry more weight than global IP-based reputation. For senders, this translates to the need for rigorous SPF and DKIM alignment; for recipients, inbox filtering tends to weight authentication consistency more heavily.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 11 | 1.0% |
| Top 1,000,000 | 853 | 75.8% |
| Unranked | 261 | 23.2% |
| TLD | Domains | Share | |
|---|---|---|---|
| .de | 681 | 60.5% | |
| .com | 220 | 19.5% | |
| .net | 56 | 5.0% | |
| .org | 31 | 2.8% | |
| .nl | 28 | 2.5% | |
| .eu | 24 | 2.1% | |
| .info | 14 | 1.2% | |
| .es | 11 | 1.0% | |
| .fr | 5 | 0.4% | |
| .me | 5 | 0.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,126 domains.
| Type | Service | Domains | Share of Strato (DE) users |
|---|---|---|---|
| ESP | Zendesk | 13 | 1.2% |
| ESP | Mailgun | 12 | 1.1% |
| ESP | Mailjet (Sinch) | 11 | 1.0% |
| ESP | Amazon SES | 9 | 0.8% |
| ESP | MailerSend | 9 | 0.8% |
| ESP | Brevo (ex-Sendinblue) | 7 | 0.6% |
| ESP | Newsletter2Go (Brevo) | 5 | 0.4% |
| ESP | SendGrid (Twilio) | 5 | 0.4% |
| ESP | Constant Contact | 5 | 0.4% |
| ESP | Mandrill | 4 | 0.4% |
Strato's frequent co-occurrence with Zendesk and similar support platforms means many hosted mailboxes handle forwarded tickets, customer feedback, and multi-layer communication workflows. These integrations often rewrite message headers or modify the envelope sender, which can degrade or break SPF alignment and DKIM signatures. Senders should verify that authentication credentials remain intact across forwarding and handoff points, particularly when messages pass through support integration layers before delivery.
See the full Strato (DE) data page (KPI cards, trend, sample domains) →
If your recipient base includes notable German-market traffic or .de domains, testing with Strato addresses is worthwhile, as authentication and regional sender reputation patterns may differ from global ISPs. This is especially important if messages are likely to pass through helpdesk or ticketing-system forwarding workflows.
1,126 domains in the Tranco top-1M use Strato (DE) as their mailbox provider as of July 12, 2026 (0.17% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Strato (DE) accounts for 0.17% 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.
Strato (DE)'s largest TLD is .de (60.5% of its domains); it appears across 45 TLDs in total.