Trend Micro Email Security email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Trend Micro Email Security is the email service provider (ESP) for 1,564 domains — 0.25% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 1,564 domains in the Tranco top-1M use Trend Micro Email Security (0.25% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .com (30.0% of its domains).
- Most co-used service: Trend Micro.
- Directory category: email security gateway.
Why Trend Micro Email Security appears in this category
Trend Micro Email Security (TMES) cloud 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.
Trend Micro Email Security is a mail filtering and gateway service operated by Trend Micro, the Japanese cybersecurity company. It provides organizations with inbound and outbound email scanning for malware, phishing, spam, and data loss, sitting between an organization's mail servers and the internet to inspect traffic before delivery.
Its presence in SPF records, particularly concentrated in smaller to mid-market organizations and dispersed across international domains, indicates that Trend Micro Email Security is relied upon as a mail relay and filtering layer by regional enterprises and smaller businesses rather than the world's largest brands. When mail originates from or passes through Trend Micro's infrastructure, its authorized servers become part of the SPF authentication chain, which affects how receiving mail systems evaluate sender legitimacy and reputation.
Where Trend Micro Email Security sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 2 | 0.1% |
| Top 10,000 | 20 | 1.3% |
| Top 100,000 | 200 | 12.8% |
| Top 1,000,000 | 1,333 | 85.2% |
| Unranked | 9 | 0.6% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 469 | 30.0% | |
| .de | 72 | 4.6% | |
| .co.jp | 67 | 4.3% | |
| .jp | 54 | 3.5% | |
| .it | 44 | 2.8% | |
| .fr | 43 | 2.7% | |
| .com.br | 43 | 2.7% | |
| .com.au | 42 | 2.7% | |
| .br | 40 | 2.6% | |
| .org | 39 | 2.5% |
What Trend Micro Email Security users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,564 domains.
| Type | Service | Domains | Share of Trend Micro Email Security users |
|---|---|---|---|
| Mailbox | Trend Micro | 679 | 43.4% |
| Mailbox | Unknown / Other | 585 | 37.4% |
| Mailbox | Microsoft 365 | 179 | 11.4% |
| Mailbox | Self-Hosted | 33 | 2.1% |
| Mailbox | Google Workspace | 21 | 1.3% |
| Mailbox | Proofpoint | 14 | 0.9% |
| ESP | Amazon SES | 153 | 9.8% |
| ESP | Salesforce | 93 | 5.9% |
| ESP | SendGrid (Twilio) | 85 | 5.4% |
| ESP | Mailchimp | 82 | 5.2% |
SPF Authorization and Trend Micro Email Security in Mail Authentication
When an organization uses Trend Micro Email Security as a mail gateway, its SPF record must authorize Trend Micro's outbound IP addresses to avoid authentication failures. This creates a dependency on Trend Micro's infrastructure reputation—if those IPs are listed on blocklists or have poor sender reputation, the organization's mail deliverability can suffer regardless of the primary domain's own reputation. Inbox providers evaluate SPF-authorized senders not only on the primary domain, but also on the reputation of intermediate relay servers, making the choice of email security provider a material factor in mail flow and acceptance.
See the full Trend Micro Email Security data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Trend Micro Email Security and should I test deliverability against it?
Trend Micro Email Security is an email gateway used by mid-market and smaller organizations to filter inbound and outbound mail for threats. If you send to organizations using it, your mail will be scanned through their security policies and may be delayed or rejected if it triggers their threat detection rules.
How many domains use Trend Micro Email Security?
1,564 domains in the Tranco top-1M use Trend Micro Email Security as their email service provider (ESP) as of September 12, 2026 (0.25% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Trend Micro Email Security common enough to affect email deliverability testing?
Trend Micro Email Security accounts for 0.25% 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 Trend Micro Email Security most?
Trend Micro Email Security's largest TLD is .com (30.0% of its domains); it appears across 139 TLDs in total.