Tricorn email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), Tricorn is the email service provider (ESP) for 195 domains — 0.03% of 637,677 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 195 domains in the Tranco top-1M use Tricorn (0.03% of SPF-publishing domains).
- Snapshot date: 2026-09-14 — recomputed every day.
- Strongest TLD: .jp (34.4% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: email service provider.
Why Tricorn appears in this category
Tricorn — Chinese marketing automation/email platform.
We classify it as a email service provider 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.
Tricorn is an email service provider that operates email infrastructure for websites worldwide. Its presence is announced through SPF include mechanisms, which publish its authorised IP address ranges in the Domain Name System records of its customer organisations.
For email practitioners, Tricorn's footprint across smaller organisations and regional markets—particularly in Japanese domains—has direct deliverability implications. Because Tricorn frequently appears alongside Microsoft 365, email administrators must account for its shared IP reputation when evaluating sender authentication and assessing recipient filtering rules.
Where Tricorn sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 14 | 7.2% |
| Top 100,000 | 39 | 20.0% |
| Top 1,000,000 | 141 | 72.3% |
| Unranked | 1 | 0.5% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .jp | 67 | 34.4% | |
| .co.jp | 63 | 32.3% | |
| .com | 38 | 19.5% | |
| .net | 9 | 4.6% | |
| .or.jp | 8 | 4.1% | |
| .ac.jp | 7 | 3.6% | |
| .org | 2 | 1.0% | |
| .ne.jp | 1 | 0.5% |
What Tricorn users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 195 domains.
| Type | Service | Domains | Share of Tricorn users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 34 | 17.4% |
| Mailbox | Google Workspace | 32 | 16.4% |
| Mailbox | Self-Hosted | 27 | 13.8% |
| Mailbox | Unknown / Other | 23 | 11.8% |
| Mailbox | SecureMX (JP) | 19 | 9.7% |
| Mailbox | Generic / unmatched (mx*.*) | 16 | 8.2% |
| ESP | Amazon SES | 39 | 20.0% |
| ESP | Salesforce | 28 | 14.4% |
| ESP | SecureMX | 19 | 9.7% |
| ESP | CrmStyle | 12 | 6.2% |
SPF includes and shared IP reputation
When Tricorn appears in a domain's SPF record, it authorises Tricorn's IP addresses to send email on that domain's behalf. Email administrators assessing sender reputation must evaluate Tricorn's shared IP pool reputation, not merely the customer organisation's reputation alone—a material distinction because Tricorn operates shared infrastructure across many smaller sites.
See the full Tricorn data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test my email against Tricorn?
Test against Tricorn if you send through it or if you monitor email from Japanese and other regional markets where Tricorn is prevalent. For senders using other major ESPs, Tricorn testing is not usually critical, but understanding its infrastructure role helps with comprehensive deliverability assessment.
How many domains use Tricorn?
195 domains in the Tranco top-1M use Tricorn as their email service provider (ESP) as of September 14, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Tricorn common enough to affect email deliverability testing?
Tricorn 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 Tricorn most?
Tricorn's largest TLD is .jp (34.4% of its domains); it appears across 8 TLDs in total.