According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Trend Micro Email Security is the email service provider (ESP) for 1,532 domains — 0.25% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
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.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 2 | 0.1% |
| Top 10,000 | 15 | 1.0% |
| Top 100,000 | 196 | 12.8% |
| Top 1,000,000 | 1,190 | 77.7% |
| Unranked | 129 | 8.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 468 | 30.5% | |
| .de | 78 | 5.1% | |
| .co.jp | 67 | 4.4% | |
| .jp | 50 | 3.3% | |
| .it | 45 | 2.9% | |
| .com.br | 43 | 2.8% | |
| .com.au | 42 | 2.7% | |
| .fr | 41 | 2.7% | |
| .br | 39 | 2.5% | |
| .org | 35 | 2.3% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,532 domains.
| Type | Service | Domains | Share of Trend Micro Email Security users |
|---|---|---|---|
| Mailbox | Trend Micro | 670 | 43.7% |
| Mailbox | Unknown / Other | 574 | 37.5% |
| Mailbox | Microsoft 365 | 173 | 11.3% |
| Mailbox | Self-Hosted | 35 | 2.3% |
| Mailbox | Google Workspace | 17 | 1.1% |
| Mailbox | Proofpoint | 12 | 0.8% |
| ESP | Amazon SES | 142 | 9.3% |
| ESP | Salesforce | 97 | 6.3% |
| ESP | Mailchimp | 89 | 5.8% |
| ESP | SendGrid (Twilio) | 79 | 5.2% |
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) →
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.
1,532 domains in the Tranco top-1M use Trend Micro Email Security as their email service provider (ESP) as of July 13, 2026 (0.25% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
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.
Trend Micro Email Security's largest TLD is .com (30.5% of its domains); it appears across 135 TLDs in total.