mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), FastMail is the mailbox provider for 1,568 domains — 0.24% of 658,108 domains with MX records. Its strongest TLD is .com (45.3% of its domains). Detection: primary MX record (lowest preference).
What else the same 1,568 domains use — cross-tabulated from the same daily snapshot (2026-07-12).
| Type | Service | Domains | Share of FastMail users |
|---|---|---|---|
| ESP | Amazon SES | 103 | 6.6% |
| ESP | Mailgun | 80 | 5.1% |
| ESP | Mailchimp | 41 | 2.6% |
| ESP | SendGrid (Twilio) | 40 | 2.6% |
| ESP | Postmark | 35 | 2.2% |
| ESP | MailerSend | 29 | 1.8% |
| ESP | Help Scout | 29 | 1.8% |
| ESP | Zendesk | 26 | 1.7% |
| ESP | Mailjet (Sinch) | 24 | 1.5% |
| ESP | Mandrill | 21 | 1.3% |
1,568 domains in the Tranco top-1M use FastMail as their mailbox provider as of July 12, 2026, according to Live Direct Marketing's daily DNS scan.
FastMail holds 0.24% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-12). The number is recomputed every day.
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-07-12).
Self-Hosted (22.43%) · Google Workspace (21.78%) · Microsoft 365 (16.73%) · Unknown / Other (7.76%) · Generic / unmatched (mx*.*) (2.77%) · Proofpoint (1.90%) · Generic / unmatched (mail.*) (1.75%) · Yandex 360 (1.64%) · Cloudflare Email Routing (1.59%) · Mimecast (1.52%)
Showing 100 of 1,568 domains.