Mailinblack email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Mailinblack is the email service provider (ESP) for 186 domains — 0.03% of 637,420 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 186 domains in the Tranco top-1M use Mailinblack (0.03% of SPF-publishing domains).
- Snapshot date: 2026-09-24 — recomputed every day.
- Strongest TLD: .fr (44.6% of its domains).
- Most co-used service: Unknown / Other.
- Directory category: email security gateway.
Why Mailinblack appears in this category
Mailinblack — French email security gateway.
We classify it as a email security gateway from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Mailinblack is an email service provider (ESP) that routes outbound mail for websites across the internet, identifiable through SPF include mechanisms in DNS records. The service sits within a competitive landscape of mid-market and smaller-scale ESP providers rather than the tier of globally dominant mail platforms.
Its footprint concentrates heavily in French-language and .fr domains, serving primarily smaller publishers rather than major international brands. Because Mailinblack records frequently appear alongside unidentified or unmapped SPF entries, the infrastructure it represents often signals mixed or incomplete email authentication configuration—a pattern that affects both sender reputation assessment and recipient filtering decisions.
Where Mailinblack sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 12 | 6.5% |
| Top 1,000,000 | 169 | 90.9% |
| Unranked | 5 | 2.7% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .fr | 83 | 44.6% | |
| .com | 83 | 44.6% | |
| .org | 8 | 4.3% | |
| .net | 2 | 1.1% | |
| .pf | 2 | 1.1% | |
| .es | 1 | 0.5% | |
| .ma | 1 | 0.5% | |
| .be | 1 | 0.5% | |
| .bio | 1 | 0.5% | |
| .biz | 1 | 0.5% |
What Mailinblack users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 186 domains.
| Type | Service | Domains | Share of Mailinblack users |
|---|---|---|---|
| Mailbox | Unknown / Other | 144 | 77.4% |
| Mailbox | Microsoft 365 | 18 | 9.7% |
| Mailbox | Generic / unmatched (mx*.*) | 8 | 4.3% |
| Mailbox | Infomaniak (CH) | 2 | 1.1% |
| Mailbox | Self-Hosted | 2 | 1.1% |
| Mailbox | Proofpoint | 2 | 1.1% |
| ESP | Mailjet (Sinch) | 58 | 31.2% |
| ESP | Brevo (ex-Sendinblue) | 35 | 18.8% |
| ESP | SendGrid (Twilio) | 22 | 11.8% |
| ESP | Salesforce | 11 | 5.9% |
Regional Concentration and Deliverability Expectations
Mailinblack's predominance in French-speaking markets and .fr domains means that deliverability teams assessing European sender reputations will encounter it with above-average frequency. Given its positioning among smaller publishers and the configuration ambiguity often surrounding its records, mail authenticated through Mailinblack should be evaluated against the same SPF, DKIM, and DMARC standards as any other mail provider, without assumptions about authentication quality based on the provider identity alone.
See the full Mailinblack data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Mailinblack and how does it affect email deliverability?
Mailinblack is an ESP concentrated among smaller publishers in French-speaking regions, identifiable through SPF include entries. Treat mail routed through Mailinblack as you would any third-party mail provider: verify authentication correctness rather than making reputation assumptions based on the provider alone.
How many domains use Mailinblack?
186 domains in the Tranco top-1M use Mailinblack as their email service provider (ESP) as of September 24, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Mailinblack common enough to affect email deliverability testing?
Mailinblack 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.
Which countries or TLDs use Mailinblack most?
Mailinblack's largest TLD is .fr (44.6% of its domains); it appears across 13 TLDs in total.