According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Sophos MXrecord is the mailbox provider for 409 domains — 0.06% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Sophos MXrecord is a mail hosting and management service operated by Sophos, the security and endpoint-protection vendor. It functions as a primary mailbox provider for organisations that select it as part of Sophos's integrated email security platform.
The provider's footprint is concentrated in smaller and mid-market organisations rather than large enterprises or mass-market brands. It is geographically spread across many domains, with a predominance of .com registrations, and frequently co-occurs with SaaS platforms such as Zendesk. This distribution pattern—among SMBs and service businesses—means that for senders targeting diverse recipient populations, Sophos MXrecord represents a subset of destinations; for organisations operating behind it, the Sophos infrastructure implies security-focused filtering and authentication policies.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.2% |
| Top 10,000 | 9 | 2.2% |
| Top 100,000 | 73 | 17.8% |
| Top 1,000,000 | 304 | 74.3% |
| Unranked | 22 | 5.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 148 | 36.2% | |
| .de | 16 | 3.9% | |
| .es | 16 | 3.9% | |
| .org | 16 | 3.9% | |
| .co.uk | 13 | 3.2% | |
| .fr | 12 | 2.9% | |
| .it | 10 | 2.4% | |
| .pt | 10 | 2.4% | |
| .net | 9 | 2.2% | |
| .gov | 8 | 2.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 409 domains.
| Type | Service | Domains | Share of Sophos MXrecord users |
|---|---|---|---|
| ESP | Zendesk | 93 | 22.7% |
| ESP | SendGrid (Twilio) | 48 | 11.7% |
| ESP | Amazon SES | 46 | 11.2% |
| ESP | HubSpot | 45 | 11.0% |
| ESP | Mandrill | 37 | 9.0% |
| ESP | Salesforce | 37 | 9.0% |
| ESP | Mailgun | 19 | 4.6% |
| ESP | Mailchimp | 17 | 4.2% |
| ESP | Mailjet (Sinch) | 10 | 2.4% |
| ESP | Freshdesk | 8 | 2.0% |
Sophos MXrecord is built on Sophos's threat-protection infrastructure and integrates sender authentication (SPF, DKIM, DMARC) and reputation assessment into its filtering model. For senders, this means that mail quality—from an authentication and sender-reputation perspective—directly influences how it is treated at Sophos-hosted domains. This is relevant for organisations whose recipients include SMBs and SaaS-integrated businesses, where Sophos MXrecord adoption is common.
See the full Sophos MXrecord data page (KPI cards, trend, sample domains) →
<p>Sophos MXrecord serves smaller organisations and SMBs rather than major brands. If your recipient distribution includes significant numbers of SMB or SaaS-integrated businesses, testing against Sophos's authentication and filtering standards provides insight into how those audiences receive your mail.</p>
409 domains in the Tranco top-1M use Sophos MXrecord as their mailbox provider as of July 13, 2026 (0.06% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Sophos MXrecord accounts for 0.06% of domains with MX records in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Sophos MXrecord's largest TLD is .com (36.2% of its domains); it appears across 69 TLDs in total.