According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), SecureMX (JP) is the mailbox provider for 585 domains — 0.09% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
SecureMX (JP) is a mailbox provider serving the Japanese email ecosystem, with primary concentration in the .co.jp domain namespace. It handles mail exchange for a distributed cluster of mid-market Japanese websites.
Since SecureMX (JP) concentrates regionally within Japan's business domain space rather than hosting the largest brands, senders and administrators targeting Japanese recipients should recognise it as a significant infrastructure point where delivery patterns and reputation handling may diverge from global-scale providers. For campaigns into Japan, understanding its regional footprint is material to testing and reputation planning.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 7 | 1.2% |
| Top 100,000 | 93 | 15.9% |
| Top 1,000,000 | 459 | 78.5% |
| Unranked | 26 | 4.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .co.jp | 317 | 54.2% | |
| .jp | 121 | 20.7% | |
| .com | 79 | 13.5% | |
| .or.jp | 30 | 5.1% | |
| .ne.jp | 9 | 1.5% | |
| .ac.jp | 8 | 1.4% | |
| .net | 7 | 1.2% | |
| .org | 3 | 0.5% | |
| .co.id | 3 | 0.5% | |
| .co.kr | 1 | 0.2% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 585 domains.
| Type | Service | Domains | Share of SecureMX (JP) users |
|---|---|---|---|
| ESP | SecureMX | 483 | 82.6% |
| ESP | Amazon SES | 81 | 13.8% |
| ESP | Salesforce | 60 | 10.3% |
| ESP | Repica WebCAS | 40 | 6.8% |
| ESP | CrmStyle | 29 | 5.0% |
| ESP | Cuenote | 24 | 4.1% |
| ESP | Zendesk | 20 | 3.4% |
| ESP | BizMatrix | 20 | 3.4% |
| ESP | Tricorn | 19 | 3.2% |
| ESP | HubSpot | 17 | 2.9% |
SecureMX (JP) hosts a distinct cluster of mid-market domains in the .co.jp space, meaning senders with significant Japanese recipient bases are likely to encounter it frequently. When testing email deliverability to Japanese recipients, sampling domains hosted on SecureMX (JP) can expose delivery or reputation issues specific to that regional infrastructure, rather than relying solely on tests against Japan's largest brands.
See the full SecureMX (JP) data page (KPI cards, trend, sample domains) →
SecureMX (JP) is a mailbox provider concentrated in Japan's .co.jp domain ecosystem. If your campaigns target Japanese recipients, including SecureMX (JP)-hosted domains in your deliverability testing is advisable to identify any region-specific delivery challenges.
585 domains in the Tranco top-1M use SecureMX (JP) as their mailbox provider as of July 13, 2026 (0.09% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
SecureMX (JP) accounts for 0.09% 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.
SecureMX (JP)'s largest TLD is .co.jp (54.2% of its domains); it appears across 17 TLDs in total.