mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 30, 2026), Mimecast is the mailbox provider for 10,255 domains — 1.54% of 667,152 domains with MX records. Its share has been stable over the last 30 days. Its strongest TLD is .com (59.5% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-07-30 DNS snapshot.
UK/global cloud secure email gateway, very large enterprise share.
Directory category: Gateway. 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 183 distinct TLDs its top three are .com (59.5%), .org (8.3%), .co.uk (6.2%) — together 74.1% of the 10,255 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 Mimecast (ESP, 7,432 domains, 72.5% of them), followed by Salesforce (11.7%). Its share of domains with MX records has not moved measurably in 30 days. 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 (2026-07-30); 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 10,255 domains use — cross-tabulated from the same daily snapshot (2026-07-30).
| Type | Service | Domains | Share of Mimecast users |
|---|---|---|---|
| ESP | Mimecast | 7,432 | 72.5% |
| ESP | Salesforce | 1,195 | 11.7% |
| ESP | SendGrid (Twilio) | 1,065 | 10.4% |
| ESP | Amazon SES | 1,025 | 10.0% |
| ESP | HubSpot | 833 | 8.1% |
| ESP | Zendesk | 796 | 7.8% |
| ESP | Mailchimp | 707 | 6.9% |
| ESP | Mandrill | 657 | 6.4% |
| ESP | Mailgun | 545 | 5.3% |
| ESP | Marketo (Adobe) | 254 | 2.5% |
10,255 domains in the Tranco top-1M use Mimecast as their mailbox provider as of July 30, 2026, according to Live Direct Marketing's daily DNS scan.
Mimecast holds 1.54% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-30). The number is recomputed every day.
Mimecast's share has been stable over the last 30 days (±0.01 pp).
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 2026-07-30).
Self-Hosted (22.74%) · Google Workspace (21.79%) · Microsoft 365 (16.94%) · Unknown / Other (6.79%) · Generic / unmatched (mx*.*) (2.55%) · Proofpoint (1.93%) · Generic / unmatched (mail.*) (1.77%) · Yandex 360 (1.68%) · Cloudflare Email Routing (1.65%) · Hostinger (1.13%)
Showing 100 of 10,255 domains.