Sophos MXrecord mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Sophos MXrecord is the mailbox provider for 458 domains — 0.07% of 675,489 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 458 domains in the Tranco top-1M use Sophos MXrecord (0.07% of domains with MX records).
- Snapshot date: 2026-09-24 — recomputed every day.
- Strongest TLD: .com (33.2% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: Zendesk.
- Directory category: email security gateway.
Why Sophos MXrecord appears in this category
Sophos Email branded as mxrecord.io / .mx for customer-facing MX.
We classify it as a email security gateway from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
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.
Where Sophos MXrecord sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.2% |
| Top 10,000 | 8 | 1.7% |
| Top 100,000 | 73 | 15.9% |
| Top 1,000,000 | 368 | 80.3% |
| Unranked | 8 | 1.7% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 152 | 33.2% | |
| .org | 18 | 3.9% | |
| .de | 16 | 3.5% | |
| .es | 15 | 3.3% | |
| .it | 14 | 3.1% | |
| .co.uk | 13 | 2.8% | |
| .be | 12 | 2.6% | |
| .fr | 12 | 2.6% | |
| .nl | 11 | 2.4% | |
| .at | 10 | 2.2% |
What Sophos MXrecord users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 458 domains.
| Type | Service | Domains | Share of Sophos MXrecord users |
|---|---|---|---|
| ESP | Zendesk | 114 | 24.9% |
| ESP | Mandrill | 50 | 10.9% |
| ESP | Amazon SES | 48 | 10.5% |
| ESP | SendGrid (Twilio) | 48 | 10.5% |
| ESP | HubSpot | 46 | 10.0% |
| ESP | Salesforce | 41 | 9.0% |
| ESP | Mailgun | 19 | 4.1% |
| ESP | Mailchimp | 16 | 3.5% |
| ESP | Mailjet (Sinch) | 13 | 2.8% |
| ESP | Freshdesk | 10 | 2.2% |
Sender authentication and Sophos's filtering approach
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) →
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Frequently asked questions
Should I include Sophos MXrecord in my email deliverability testing?
<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>
How many domains use Sophos MXrecord?
458 domains in the Tranco top-1M use Sophos MXrecord as their mailbox provider as of September 24, 2026 (0.07% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Sophos MXrecord common enough to affect email deliverability testing?
Sophos MXrecord accounts for 0.07% 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.
Which countries or TLDs use Sophos MXrecord most?
Sophos MXrecord's largest TLD is .com (33.2% of its domains); it appears across 67 TLDs in total.