mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), Proofpoint is the mailbox provider for 12,797 domains — 1.92% of 667,887 domains with MX records. Its share has been stable over the last 30 days. Its strongest TLD is .com (61.1% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-07-26 DNS snapshot.
US enterprise email security, market leader for large orgs.
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 213 distinct TLDs its top three are .com (61.1%), .org (5.4%), .com.au (2.9%) — together 69.3% of the 12,797 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Proofpoint (ESP, 4,883 domains, 38.2% of them), followed by Salesforce (8.6%). 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 (2026-07-26); 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 12,797 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of Proofpoint users |
|---|---|---|---|
| ESP | Proofpoint | 4,883 | 38.2% |
| ESP | Salesforce | 1,099 | 8.6% |
| ESP | Amazon SES | 838 | 6.5% |
| ESP | Zendesk | 726 | 5.7% |
| ESP | SendGrid (Twilio) | 687 | 5.4% |
| ESP | Mandrill | 497 | 3.9% |
| ESP | HubSpot | 466 | 3.6% |
| ESP | Mailchimp | 455 | 3.6% |
| ESP | Mailgun | 334 | 2.6% |
| ESP | Marketo (Adobe) | 301 | 2.4% |
12,797 domains in the Tranco top-1M use Proofpoint as their mailbox provider as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
Proofpoint holds 1.92% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
Proofpoint'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 2026-07-26).
Self-Hosted (22.75%) · Google Workspace (21.84%) · Microsoft 365 (16.92%) · Unknown / Other (6.80%) · Generic / unmatched (mx*.*) (2.54%) · Generic / unmatched (mail.*) (1.77%) · Yandex 360 (1.68%) · Cloudflare Email Routing (1.63%) · Mimecast (1.53%) · Hostinger (1.15%)
Showing 100 of 12,797 domains.