mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Runbox is the mailbox provider for 66 domains — 0.01% of 658,711 domains with MX records. Its strongest TLD is .com (33.3% of its domains). Detection: primary MX record (lowest preference).
What else the same 66 domains use — cross-tabulated from the same daily snapshot (2026-07-13).
| Type | Service | Domains | Share of Runbox users |
|---|---|---|---|
| ESP | Amazon SES | 4 | 6.1% |
| ESP | Mailchimp | 2 | 3.0% |
| ESP | Mailgun | 1 | 1.5% |
| ESP | HubSpot | 1 | 1.5% |
| ESP | Postmark | 1 | 1.5% |
| ESP | SenderSRV | 1 | 1.5% |
| ESP | SendGrid (Twilio) | 1 | 1.5% |
| ESP | Help Scout | 1 | 1.5% |
| ESP | Zendesk | 1 | 1.5% |
66 domains in the Tranco top-1M use Runbox as their mailbox provider as of July 13, 2026, according to Live Direct Marketing's daily DNS scan.
Runbox holds 0.01% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-13). 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 2026-07-13).
Self-Hosted (22.44%) · Google Workspace (21.78%) · Microsoft 365 (16.74%) · Unknown / Other (7.54%) · Generic / unmatched (mx*.*) (2.57%) · Proofpoint (1.90%) · Generic / unmatched (mail.*) (1.75%) · Yandex 360 (1.64%) · Cloudflare Email Routing (1.60%) · Mimecast (1.52%)
Showing 66 of 66 domains.