FastMail email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), FastMail is the mailbox provider for 1,722 domains — 0.26% of 674,487 domains with MX records. Its strongest TLD is .com (44.2% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-14 DNS snapshot.
What FastMail represents in this dataset
Australian privacy-focused IMAP/JMAP host. Powers Topicbox, custom domains.
Directory category: Mailbox. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-14 snapshot shows about FastMail
Across 171 distinct TLDs its top three are .com (44.2%), .org (11.1%), .net (9.9%) — together 65.2% of the 1,722 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Amazon SES (ESP, 106 domains, 6.2% of them), followed by Mailgun (4.8%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-14); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with FastMail
What else the same 1,722 domains use — cross-tabulated from the same daily snapshot (2026-09-14).
| Type | Service | Domains | Share of FastMail users |
|---|---|---|---|
| ESP | Amazon SES | 106 | 6.2% |
| ESP | Mailgun | 83 | 4.8% |
| ESP | Mailchimp | 47 | 2.7% |
| ESP | SendGrid (Twilio) | 38 | 2.2% |
| ESP | Postmark | 35 | 2.0% |
| ESP | Help Scout | 26 | 1.5% |
| ESP | Zendesk | 25 | 1.5% |
| ESP | MailerLite | 24 | 1.4% |
| ESP | Mailjet (Sinch) | 23 | 1.3% |
| ESP | Mandrill | 20 | 1.2% |
TLD distribution (top 30 of 171)
Frequently asked questions
How many domains use FastMail?
1,722 domains in the Tranco top-1M use FastMail as their mailbox provider as of September 14, 2026, according to Live Direct Marketing's daily DNS scan.
What is FastMail's market share?
FastMail holds 0.26% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-14). The number is recomputed every day.
What are the biggest alternatives to FastMail?
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 2026-09-14).
Largest mailbox providers in this category
Self-Hosted (22.46%) · Google Workspace (21.60%) · Microsoft 365 (16.95%) · Unknown / Other (6.60%) · Generic / unmatched (mx*.*) (2.54%) · Generic / unmatched (mail.*) (1.94%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.62%) · Mimecast (1.46%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 1,722 domains.