Proofpoint email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Proofpoint is the email service provider (ESP) for 5,775 domains — 0.92% of 629,828 SPF-publishing domains. Over the last 30 days its share declined by 0.02 pp. Its strongest TLD is .com (56.1% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-12 DNS snapshot.
What Proofpoint represents in this dataset
Proofpoint — leading enterprise email security gateway providing inbound filtering and outbound DLP.
Directory category: Gateway. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-12 snapshot shows about Proofpoint
Across 178 distinct TLDs its top three are .com (56.1%), .org (5.1%), .com.au (3.2%) — together 64.4% of the 5,775 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Proofpoint (Mailbox, 4,774 domains, 82.7% of them), followed by Microsoft 365 (7.3%). Its share of SPF-publishing domains moved -0.02 pp in 30 days — inside the daily noise of list rotation. Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-12); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Proofpoint
What else the same 5,775 domains use — cross-tabulated from the same daily snapshot (2026-09-12).
| Type | Service | Domains | Share of Proofpoint users |
|---|---|---|---|
| Mailbox | Proofpoint | 4,774 | 82.7% |
| Mailbox | Microsoft 365 | 424 | 7.3% |
| Mailbox | Google Workspace | 99 | 1.7% |
| Mailbox | Unknown / Other | 92 | 1.6% |
| Mailbox | Self-Hosted | 70 | 1.2% |
| Mailbox | Mimecast | 44 | 0.8% |
| ESP | Salesforce | 811 | 14.0% |
| ESP | Amazon SES | 577 | 10.0% |
| ESP | Zendesk | 537 | 9.3% |
| ESP | SendGrid (Twilio) | 508 | 8.8% |
TLD distribution (top 30 of 178)
Frequently asked questions
How many domains use Proofpoint?
5,775 domains in the Tranco top-1M use Proofpoint as their email service provider (ESP) as of September 12, 2026, according to Live Direct Marketing's daily DNS scan.
What is Proofpoint's market share?
Proofpoint holds 0.92% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-12). The number is recomputed every day.
Is Proofpoint growing or declining?
Proofpoint's share declined by 0.02 percentage points over the last 30 days (as of September 12, 2026).
What are the biggest alternatives to Proofpoint?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-09-12).
Largest email service provider (ESP)s in this category
Amazon SES (6.18%) · SendGrid (Twilio) (4.63%) · Mailgun (4.01%) · Zendesk (3.76%) · Mailchimp (3.57%) · Mandrill (3.25%) · HubSpot (3.11%) · Salesforce (2.55%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.94%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 5,775 domains.