According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), WiLL Mail is the email service provider (ESP) for 235 domains — 0.04% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
WiLL Mail is an email service provider used for outbound sending by smaller organisations and mid-market companies, with substantial adoption in Japan and across the Asia-Pacific region. It functions as a complementary sending infrastructure for organisations that distribute mail through multiple authorised vendors.
For email professionals monitoring sender reputation and designing filter policies, WiLL Mail's appearance in SPF records signals mail from smaller, often internationally distributed organisations—particularly those with Japanese market presence. Its frequent pairing with Google Workspace indicates that these organisations authorise both vendors to send mail on their behalf, a configuration pattern that affects how ISPs and filtering systems evaluate sender trustworthiness across split sending paths.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 0.9% |
| Top 100,000 | 22 | 9.4% |
| Top 1,000,000 | 193 | 82.1% |
| Unranked | 18 | 7.7% |
| TLD | Domains | Share | |
|---|---|---|---|
| .co.jp | 84 | 35.7% | |
| .com | 63 | 26.8% | |
| .jp | 60 | 25.5% | |
| .or.jp | 9 | 3.8% | |
| .net | 6 | 2.6% | |
| .ac.jp | 5 | 2.1% | |
| .ne.jp | 2 | 0.9% | |
| .tv | 2 | 0.9% | |
| .tokyo | 1 | 0.4% | |
| .in | 1 | 0.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 235 domains.
| Type | Service | Domains | Share of WiLL Mail users |
|---|---|---|---|
| Mailbox | Google Workspace | 64 | 27.2% |
| Mailbox | Unknown / Other | 41 | 17.4% |
| Mailbox | Microsoft 365 | 40 | 17.0% |
| Mailbox | Self-Hosted | 38 | 16.2% |
| Mailbox | SecureMX (JP) | 13 | 5.5% |
| Mailbox | Amazon WorkMail | 7 | 3.0% |
| ESP | Amazon SES | 58 | 24.7% |
| ESP | HDEMS | 23 | 9.8% |
| ESP | Salesforce | 18 | 7.7% |
| ESP | Zendesk | 13 | 5.5% |
When WiLL Mail appears in an organisation's SPF record alongside Google Workspace, email receivers must evaluate two separate authorised sending paths rather than assessing a single consolidated platform. Because WiLL Mail operates at smaller scale than the largest global ESPs, many filtering and reputation systems have limited historical traffic patterns specific to it. This can result in heightened scrutiny or more conservative filtering for mail from such split configurations. Senders using WiLL Mail in combination with Google Workspace should monitor delivery rates and junk-folder placement metrics separately for each vendor to identify whether one authorised sender is experiencing downstream filtering or reputation issues that the other avoids.
See the full WiLL Mail data page (KPI cards, trend, sample domains) →
WiLL Mail is an ESP frequently used by smaller organisations in Japan and Asia-Pacific in addition to Google Workspace; both appearing in an SPF record means the organisation authorises both to send mail on its behalf, typically routing different traffic types through each vendor.
235 domains in the Tranco top-1M use WiLL Mail as their email service provider (ESP) as of July 13, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
WiLL Mail accounts for 0.04% 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.
WiLL Mail's largest TLD is .co.jp (35.7% of its domains); it appears across 12 TLDs in total.