Trend Micro mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Trend Micro is the mailbox provider for 1,139 domains — 0.17% of 665,310 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 1,139 domains in the Tranco top-1M use Trend Micro (0.17% of domains with MX records).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .com (30.5% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: Trend Micro Email Security.
- Directory category: email security gateway.
Why Trend Micro appears in this category
Trend Micro hosted email security.
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.
Trend Micro operates email security gateways and hosted email platforms, providing filtering and threat protection to organisations of various sizes. Its Email Security service is the most common touchpoint for senders — mail destined for Trend Micro-hosted inboxes is processed through its centralised filtering infrastructure.
Across the Tranco top-1M domain list, Trend Micro serves as the primary mail exchanger predominantly for smaller and mid-sized sites in the long tail rather than the largest brands globally. Its deployment spans many countries and TLDs, with particular concentration in .com domains and a skew towards North America. For email senders, this pattern means encountering Trend Micro more frequently on smaller-domain recipients, where mail passes through shared platform filtering rather than direct ISP delivery.
Where Trend Micro sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 15 | 1.3% |
| Top 100,000 | 159 | 14.0% |
| Top 1,000,000 | 957 | 84.0% |
| Unranked | 7 | 0.6% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 347 | 30.5% | |
| .co.jp | 108 | 9.5% | |
| .jp | 72 | 6.3% | |
| .com.br | 62 | 5.4% | |
| .com.au | 60 | 5.3% | |
| .com.ar | 42 | 3.7% | |
| .br | 40 | 3.5% | |
| .org | 39 | 3.4% | |
| .ar | 20 | 1.8% | |
| .com.my | 15 | 1.3% |
What Trend Micro users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,139 domains.
| Type | Service | Domains | Share of Trend Micro users |
|---|---|---|---|
| ESP | Trend Micro Email Security | 679 | 59.6% |
| ESP | Amazon SES | 99 | 8.7% |
| ESP | Salesforce | 65 | 5.7% |
| ESP | SendGrid (Twilio) | 62 | 5.4% |
| ESP | Mailchimp | 44 | 3.9% |
| ESP | Zendesk | 43 | 3.8% |
| ESP | Mandrill | 40 | 3.5% |
| ESP | Mailgun | 39 | 3.4% |
| ESP | HubSpot | 29 | 2.5% |
| ESP | Mailjet (Sinch) | 21 | 1.8% |
Shared Infrastructure and Multi-Tenant Filtering
Trend Micro Email Security operates as a shared platform gateway, meaning reputation and filtering rules are enforced across multiple customer organisations simultaneously. Senders may experience stricter or more aggressive filtering on Trend Micro-hosted domains than on direct ISP providers, since the platform must balance security requirements across all its downstream customers from a single vantage point. Bounce and complaint feedback flows through Trend Micro's systems rather than per-domain controls, affecting reputation signals for future mail to the platform.
See the full Trend Micro data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email deliverability against Trend Micro-hosted domains?
Yes, if your recipient list includes smaller or mid-market domains using Trend Micro Email Security. Trend Micro's concentration in the long tail of websites makes it relevant for senders targeting domains outside the largest global enterprises.
How many domains use Trend Micro?
1,139 domains in the Tranco top-1M use Trend Micro as their mailbox provider as of September 12, 2026 (0.17% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Trend Micro common enough to affect email deliverability testing?
Trend Micro accounts for 0.17% 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 Trend Micro most?
Trend Micro's largest TLD is .com (30.5% of its domains); it appears across 101 TLDs in total.