According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Cybermail is the email service provider (ESP) for 188 domains — 0.03% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Cybermail is an email service provider that sends transactional and marketing email on behalf of its clients, primarily in the Japanese market. It publishes SPF records via include mechanisms, meaning senders using Cybermail must list its infrastructure in their SPF policy to prevent authentication failures and deliver mail successfully.
Cybermail's footprint in email authentication data is concentrated in the .co.jp domain space and skewed toward smaller and mid-market sites rather than the largest brands. This pattern — combined with its frequent appearance alongside unlabelled or unknown senders in SPF records — indicates Cybermail serves a specific regional niche where sender reputation and ISP monitoring visibility may differ from that of mainstream global ESPs.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 1.1% |
| Top 100,000 | 17 | 9.0% |
| Top 1,000,000 | 161 | 85.6% |
| Unranked | 8 | 4.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .co.jp | 96 | 51.1% | |
| .jp | 45 | 23.9% | |
| .com | 30 | 16.0% | |
| .or.jp | 12 | 6.4% | |
| .ne.jp | 3 | 1.6% | |
| .ac.jp | 2 | 1.1% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 188 domains.
| Type | Service | Domains | Share of Cybermail users |
|---|---|---|---|
| Mailbox | Unknown / Other | 134 | 71.3% |
| Mailbox | Microsoft 365 | 22 | 11.7% |
| Mailbox | Google Workspace | 18 | 9.6% |
| Mailbox | Self-Hosted | 5 | 2.7% |
| Mailbox | SecureMX (JP) | 3 | 1.6% |
| Mailbox | Proofpoint | 2 | 1.1% |
| ESP | Amazon SES | 26 | 13.8% |
| ESP | Repica WebCAS | 18 | 9.6% |
| ESP | Q-Send | 15 | 8.0% |
| ESP | BizMatrix | 15 | 8.0% |
When Cybermail appears in an SPF record, it identifies a sender as using a regional or specialist ESP rather than a globally recognised platform. Major mailbox providers build reputation systems and blocklists chiefly around the largest senders and well-known platforms; ESPs concentrated in specific geographies or customer segments often receive less explicit public monitoring or reputation scoring. Consequently, Cybermail mail may pass SPF authentication without triggering reputation-based filters at some receivers, yet simultaneously lack the established trust signals that come with the scale and brand recognition of larger global ESPs. Senders relying on Cybermail should verify deliverability independently with target mailboxes and monitor bounce patterns, rather than assuming that SPF passing alone guarantees inbox placement.
See the full Cybermail data page (KPI cards, trend, sample domains) →
Cybermail is an email service provider used to send mail on behalf of your site or platform. If it appears in your SPF include, your domain has authorised Cybermail's mail servers to send email in your domain's name, and your SPF policy must list it to allow authentication to succeed.
188 domains in the Tranco top-1M use Cybermail as their email service provider (ESP) as of July 13, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Cybermail accounts for 0.03% 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.
Cybermail's largest TLD is .co.jp (51.1% of its domains); it appears across 6 TLDs in total.