Proofpoint email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 7, 2026), Proofpoint is the email service provider (ESP) for 5,829 domains — 0.92% of 632,414 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (55.7% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-07 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 2026-09-07 snapshot shows about Proofpoint
Across 181 distinct TLDs its top three are .com (55.7%), .org (5.1%), .com.au (3.1%) — together 64.0% of the 5,829 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Proofpoint (Mailbox, 4,824 domains, 82.8% of them), followed by Microsoft 365 (7.2%). Its share of SPF-publishing domains has not moved measurably in 30 days. 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 (2026-09-07); 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 5,829 domains use — cross-tabulated from the same daily snapshot (2026-09-07).
| Type | Service | Domains | Share of Proofpoint users |
|---|---|---|---|
| Mailbox | Proofpoint | 4,824 | 82.8% |
| Mailbox | Microsoft 365 | 417 | 7.2% |
| Mailbox | Google Workspace | 104 | 1.8% |
| Mailbox | Unknown / Other | 92 | 1.6% |
| Mailbox | Self-Hosted | 70 | 1.2% |
| Mailbox | Mimecast | 48 | 0.8% |
| ESP | Salesforce | 812 | 13.9% |
| ESP | Amazon SES | 577 | 9.9% |
| ESP | Zendesk | 539 | 9.2% |
| ESP | SendGrid (Twilio) | 507 | 8.7% |
TLD distribution (top 30 of 181)
Frequently asked questions
How many domains use Proofpoint?
5,829 domains in the Tranco top-1M use Proofpoint as their email service provider (ESP) as of September 7, 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 2026-09-07). The number is recomputed every day.
Is Proofpoint growing or declining?
Proofpoint's share has been stable over the last 30 days (±0.01 pp).
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 2026-09-07).
Largest email service provider (ESP)s in this category
Amazon SES (6.14%) · SendGrid (Twilio) (4.61%) · Mailgun (3.99%) · Zendesk (3.74%) · Mailchimp (3.56%) · Mandrill (3.24%) · HubSpot (3.09%) · Salesforce (2.53%) · Mailjet (Sinch) (2.11%) · Cloudflare Email Routing (1.91%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 5,829 domains.