According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Clean MX is the email service provider (ESP) for 210 domains — 0.03% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Clean MX is a mail service provider appearing in the email infrastructure of smaller websites and organisations, with particular concentration in the Portuguese (.pt) domain space. It is identified through SPF authentication records, which authorise Clean MX to send email on behalf of those organisations.
The presence of Clean MX in the long tail of smaller sites rather than among major brands reflects a distinct segment of the email market. For senders and recipients involved with Clean MX, understanding its typical deployment pattern—often alongside generic or unmatched MX entries—is useful when diagnosing mail routing configuration, authentication setup, and infrastructure questions. Recognising this marker helps explain the operational context of mail passing through Clean MX.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.5% |
| Top 100,000 | 2 | 1.0% |
| Top 1,000,000 | 153 | 72.9% |
| Unranked | 54 | 25.7% |
| TLD | Domains | Share | |
|---|---|---|---|
| .pt | 111 | 52.9% | |
| .com | 77 | 36.7% | |
| .net | 9 | 4.3% | |
| .org | 4 | 1.9% | |
| .ao | 3 | 1.4% | |
| .io | 1 | 0.5% | |
| .com.br | 1 | 0.5% | |
| .info | 1 | 0.5% | |
| .store | 1 | 0.5% | |
| .es | 1 | 0.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 210 domains.
| Type | Service | Domains | Share of Clean MX users |
|---|---|---|---|
| Mailbox | Generic / unmatched (mx*.*) | 89 | 42.4% |
| Mailbox | Self-Hosted | 72 | 34.3% |
| Mailbox | Microsoft 365 | 26 | 12.4% |
| Mailbox | Unknown / Other | 9 | 4.3% |
| Mailbox | Google Workspace | 8 | 3.8% |
| Mailbox | Zoho Mail | 1 | 0.5% |
| ESP | KMITD (TH) | 33 | 15.7% |
| ESP | Mailjet (Sinch) | 10 | 4.8% |
| ESP | Mailchimp | 8 | 3.8% |
| ESP | Brevo (ex-Sendinblue) | 8 | 3.8% |
Clean MX typically co-occurs with generic or pattern-based MX entries (such as mx*.*) in organisations that adopt it. This pairing indicates a simpler or less standardised approach to mail infrastructure than platforms with dedicated relay tiers. When evaluating mail authorised via Clean MX's SPF includes, stability and reputation of the authorised IP ranges deserve attention, since configurations combining generic MX patterns with Clean MX authorisation can present different authentication or reputation profiles than single-vendor or premium ESP platforms.
See the full Clean MX data page (KPI cards, trend, sample domains) →
Clean MX is a mail service provider used primarily by smaller organisations, especially in Portugal. It matters for deliverability if you engage with mail from organisations using Clean MX; understanding its infrastructure pattern helps diagnose authentication and routing behaviour.
210 domains in the Tranco top-1M use Clean MX as their email service provider (ESP) as of July 13, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Clean MX accounts for 0.03% of SPF-publishing domains 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.
Clean MX's largest TLD is .pt (52.9% of its domains); it appears across 11 TLDs in total.