SecureMX email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), SecureMX is the email service provider (ESP) for 620 domains — 0.10% of 631,089 SPF-publishing domains. Its strongest TLD is .co.jp (52.6% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-11 DNS snapshot.
What SecureMX represents in this dataset
SecureMX — Japanese email security gateway.
Directory category: Gateway. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-11 snapshot shows about SecureMX
Across 15 distinct TLDs its top three are .co.jp (52.6%), .jp (23.1%), .com (12.4%) — together 88.1% of the 620 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is SecureMX (JP) (Mailbox, 490 domains, 79.0% of them), followed by Microsoft 365 (8.1%). Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-11); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with SecureMX
What else the same 620 domains use — cross-tabulated from the same daily snapshot (2026-09-11).
| Type | Service | Domains | Share of SecureMX users |
|---|---|---|---|
| Mailbox | SecureMX (JP) | 490 | 79.0% |
| Mailbox | Microsoft 365 | 50 | 8.1% |
| Mailbox | Unknown / Other | 21 | 3.4% |
| Mailbox | Google Workspace | 20 | 3.2% |
| Mailbox | Self-Hosted | 16 | 2.6% |
| Mailbox | Trend Micro | 6 | 1.0% |
| ESP | Amazon SES | 88 | 14.2% |
| ESP | Salesforce | 57 | 9.2% |
| ESP | Repica WebCAS | 46 | 7.4% |
| ESP | Cuenote | 27 | 4.4% |
TLD distribution (top 15 of 15)
Frequently asked questions
How many domains use SecureMX?
620 domains in the Tranco top-1M use SecureMX as their email service provider (ESP) as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is SecureMX's market share?
SecureMX holds 0.10% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
What are the biggest alternatives to SecureMX?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-09-11).
Largest email service provider (ESP)s in this category
Amazon SES (6.17%) · SendGrid (Twilio) (4.63%) · Mailgun (4.00%) · Zendesk (3.76%) · Mailchimp (3.56%) · Mandrill (3.24%) · HubSpot (3.10%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.93%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 620 domains.