Proofpoint email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 18, 2026), Proofpoint is the mailbox provider for 12,560 domains — 1.86% of 675,783 domains with MX records. Over the last 30 days its share declined by 0.04 pp. Its strongest TLD is .com (61.2% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-18 DNS snapshot.
What Proofpoint represents in this dataset
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.
What the 2026-09-18 snapshot shows about Proofpoint
Across 214 distinct TLDs its top three are .com (61.2%), .org (5.4%), .com.au (2.9%) — together 69.5% of the 12,560 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Proofpoint (ESP, 4,766 domains, 37.9% of them), followed by Salesforce (8.8%). Its share of domains with MX records moved -0.04 pp in 30 days — inside the daily noise of list rotation. 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 (2026-09-18); 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.
Commonly used together with Proofpoint
What else the same 12,560 domains use — cross-tabulated from the same daily snapshot (2026-09-18).
| Type | Service | Domains | Share of Proofpoint users |
|---|---|---|---|
| ESP | Proofpoint | 4,766 | 37.9% |
| ESP | Salesforce | 1,099 | 8.8% |
| ESP | Amazon SES | 835 | 6.6% |
| ESP | Zendesk | 746 | 5.9% |
| ESP | SendGrid (Twilio) | 689 | 5.5% |
| ESP | Mandrill | 484 | 3.9% |
| ESP | HubSpot | 466 | 3.7% |
| ESP | Mailchimp | 459 | 3.7% |
| ESP | Mailgun | 340 | 2.7% |
| ESP | Marketo (Adobe) | 307 | 2.4% |
TLD distribution (top 30 of 214)
Frequently asked questions
How many domains use Proofpoint?
12,560 domains in the Tranco top-1M use Proofpoint as their mailbox provider as of September 18, 2026, according to Live Direct Marketing's daily DNS scan.
What is Proofpoint's market share?
Proofpoint holds 1.86% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-18). The number is recomputed every day.
Is Proofpoint growing or declining?
Proofpoint's share declined by 0.04 percentage points over the last 30 days (as of September 18, 2026).
What are the biggest alternatives to Proofpoint?
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 2026-09-18).
Largest mailbox providers in this category
Self-Hosted (22.49%) · Google Workspace (21.62%) · Microsoft 365 (17.01%) · Unknown / Other (6.67%) · Generic / unmatched (mx*.*) (2.54%) · Generic / unmatched (mail.*) (1.94%) · Cloudflare Email Routing (1.75%) · Yandex 360 (1.63%) · Mimecast (1.46%) · Hostinger (1.20%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 12,560 domains.