SecureMX email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), SecureMX is the email service provider (ESP) for 635 domains — 0.10% of 637,420 SPF-publishing domains. Its strongest TLD is .co.jp (53.4% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 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 2026-09-24 snapshot shows about SecureMX
Across 15 distinct TLDs its top three are .co.jp (53.4%), .jp (21.7%), .com (12.9%) — together 88.0% of the 635 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, 501 domains, 78.9% of them), followed by Microsoft 365 (8.3%). 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 (2026-09-24); 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 635 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of SecureMX users |
|---|---|---|---|
| Mailbox | SecureMX (JP) | 501 | 78.9% |
| Mailbox | Microsoft 365 | 53 | 8.3% |
| Mailbox | Unknown / Other | 21 | 3.3% |
| Mailbox | Google Workspace | 20 | 3.1% |
| Mailbox | Self-Hosted | 17 | 2.7% |
| Mailbox | Proofpoint | 6 | 0.9% |
| ESP | Amazon SES | 87 | 13.7% |
| ESP | Salesforce | 60 | 9.4% |
| ESP | Repica WebCAS | 47 | 7.4% |
| ESP | CrmStyle | 28 | 4.4% |
TLD distribution (top 15 of 15)
Frequently asked questions
How many domains use SecureMX?
635 domains in the Tranco top-1M use SecureMX as their email service provider (ESP) as of September 24, 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 2026-09-24). 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 2026-09-24).
Largest email service provider (ESP)s in this category
Amazon SES (6.23%) · SendGrid (Twilio) (4.68%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.61%) · Mandrill (3.26%) · HubSpot (3.18%) · Salesforce (2.57%) · Mailjet (Sinch) (2.14%) · Cloudflare Email Routing (1.96%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 635 domains.