mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), Hosted Email (Rackspace/IONOS) is the mailbox provider for 1,702 domains — 0.25% of 667,887 domains with MX records. Its strongest TLD is .com (66.4% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-07-26 DNS snapshot.
Rackspace Webmail / IONOS shared platform.
Directory category: Mailbox. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
Across 86 distinct TLDs its top three are .com (66.4%), .net (7.2%), .org (4.5%) — together 78.0% of the 1,702 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Wild West Domains Forwarder (ESP, 100 domains, 5.9% of them), followed by Amazon SES (3.5%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-07-26); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
What else the same 1,702 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of Hosted Email (Rackspace/IONOS) users |
|---|---|---|---|
| ESP | Wild West Domains Forwarder | 100 | 5.9% |
| ESP | Amazon SES | 59 | 3.5% |
| ESP | Mailgun | 45 | 2.6% |
| ESP | SendGrid (Twilio) | 23 | 1.4% |
| ESP | MailerSend | 22 | 1.3% |
| ESP | Zendesk | 19 | 1.1% |
| ESP | Mailchimp | 19 | 1.1% |
| ESP | Mandrill | 16 | 0.9% |
| ESP | HubSpot | 8 | 0.5% |
| ESP | Salesforce | 8 | 0.5% |
1,702 domains in the Tranco top-1M use Hosted Email (Rackspace/IONOS) as their mailbox provider as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
Hosted Email (Rackspace/IONOS) holds 0.25% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-07-26).
Self-Hosted (22.75%) · Google Workspace (21.84%) · Microsoft 365 (16.92%) · Unknown / Other (6.80%) · Generic / unmatched (mx*.*) (2.54%) · Proofpoint (1.92%) · Generic / unmatched (mail.*) (1.77%) · Yandex 360 (1.68%) · Cloudflare Email Routing (1.63%) · Mimecast (1.53%)
Showing 100 of 1,702 domains.