esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Repica WebCAS is the email service provider (ESP) for 727 domains — 0.12% of 617,244 SPF-publishing domains. Its strongest TLD is .jp (33.3% of its domains). Detection: include: mechanisms in the SPF record.
What else the same 727 domains use — cross-tabulated from the same daily snapshot (2026-07-12).
| Type | Service | Domains | Share of Repica WebCAS users |
|---|---|---|---|
| Mailbox | Google Workspace | 153 | 21.0% |
| Mailbox | Self-Hosted | 146 | 20.1% |
| Mailbox | Microsoft 365 | 142 | 19.5% |
| Mailbox | Unknown / Other | 115 | 15.8% |
| Mailbox | SecureMX (JP) | 40 | 5.5% |
| Mailbox | Amazon WorkMail | 15 | 2.1% |
| ESP | Amazon SES | 162 | 22.3% |
| ESP | Salesforce | 67 | 9.2% |
| ESP | FSI Email Security | 47 | 6.5% |
| ESP | SecureMX | 47 | 6.5% |
727 domains in the Tranco top-1M use Repica WebCAS as their email service provider (ESP) as of July 12, 2026, according to Live Direct Marketing's daily DNS scan.
Repica WebCAS holds 0.12% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-12). The number is recomputed every day.
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 2026-07-12).
Amazon SES (6.21%) · SendGrid (Twilio) (4.75%) · Mailgun (4.11%) · Zendesk (3.87%) · Mailchimp (3.69%) · Mandrill (3.36%) · HubSpot (3.18%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.80%)
Showing 100 of 727 domains.