Sophos Email email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Sophos Email is the email service provider (ESP) for 302 domains — 0.05% of 631,089 SPF-publishing domains. Its strongest TLD is .com (36.8% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-11 DNS snapshot.
What Sophos Email represents in this dataset
Sophos Email (Hydra) — cloud security gateway.
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 2026-09-11 snapshot shows about Sophos Email
Across 50 distinct TLDs its top three are .com (36.8%), .de (11.6%), .org (9.9%) — together 58.3% of the 302 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Sophos Email (Mailbox, 198 domains, 65.6% of them), followed by Microsoft 365 (24.8%). 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 (2026-09-11); 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 Sophos Email
What else the same 302 domains use — cross-tabulated from the same daily snapshot (2026-09-11).
| Type | Service | Domains | Share of Sophos Email users |
|---|---|---|---|
| Mailbox | Sophos Email | 198 | 65.6% |
| Mailbox | Microsoft 365 | 75 | 24.8% |
| Mailbox | Self-Hosted | 6 | 2.0% |
| Mailbox | Unknown / Other | 5 | 1.7% |
| Mailbox | Mimecast | 4 | 1.3% |
| Mailbox | Proofpoint | 3 | 1.0% |
| ESP | Mailchimp | 18 | 6.0% |
| ESP | Amazon SES | 18 | 6.0% |
| ESP | Mailgun | 16 | 5.3% |
| ESP | SendGrid (Twilio) | 16 | 5.3% |
TLD distribution (top 30 of 50)
Frequently asked questions
How many domains use Sophos Email?
302 domains in the Tranco top-1M use Sophos Email as their email service provider (ESP) as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is Sophos Email's market share?
Sophos Email holds 0.05% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
What are the biggest alternatives to Sophos Email?
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 2026-09-11).
Largest email service provider (ESP)s in this category
Amazon SES (6.17%) · SendGrid (Twilio) (4.63%) · Mailgun (4.00%) · Zendesk (3.76%) · Mailchimp (3.56%) · Mandrill (3.24%) · HubSpot (3.10%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.93%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 302 domains.