Self-Hosted email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 13, 2026), Self-Hosted is the mailbox provider for 148,813 domains — 22.38% of 664,797 domains with MX records. Over the last 30 days its share declined by 0.25 pp. Its strongest TLD is .com (36.3% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-13 DNS snapshot.
What Self-Hosted represents in this dataset
Domains running their own mail server (MX target on the same apex). Spans hobbyists, ISPs, and large enterprises with private infrastructure.
Directory category: Self. 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 2026-09-13 snapshot shows about Self-Hosted
Across 635 distinct TLDs its top three are .com (36.3%), .net (7.2%), .ru (7.0%) — together 50.5% of the 148,813 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, 2,839 domains, 1.9% of them), followed by MailChannels (1.6%). Its share of domains with MX records moved -0.25 pp in 30 days, a change larger than list churn alone explains. Directly comparable by the same detection rule: Google Workspace, Microsoft 365, Unknown / Other. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-13); 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 Self-Hosted
What else the same 148,813 domains use — cross-tabulated from the same daily snapshot (2026-09-13).
| Type | Service | Domains | Share of Self-Hosted users |
|---|---|---|---|
| ESP | Amazon SES | 2,839 | 1.9% |
| ESP | MailChannels | 2,407 | 1.6% |
| ESP | Mailgun | 1,530 | 1.0% |
| ESP | SendGrid (Twilio) | 1,437 | 1.0% |
| ESP | Mailchimp | 1,351 | 0.9% |
| ESP | Mailjet (Sinch) | 1,237 | 0.8% |
| ESP | Mandrill | 1,138 | 0.8% |
| ESP | Brevo (ex-Sendinblue) | 1,067 | 0.7% |
| ESP | MailerLite | 1,011 | 0.7% |
| ESP | Unisender (RU) | 996 | 0.7% |
TLD distribution (top 30 of 635)
Frequently asked questions
How many domains use Self-Hosted?
148,813 domains in the Tranco top-1M use Self-Hosted as their mailbox provider as of September 13, 2026, according to Live Direct Marketing's daily DNS scan.
What is Self-Hosted's market share?
Self-Hosted holds 22.38% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-13). The number is recomputed every day.
Is Self-Hosted growing or declining?
Self-Hosted's share declined by 0.25 percentage points over the last 30 days (as of September 13, 2026).
What are the biggest alternatives to Self-Hosted?
The largest mailbox providers in the same category by Tranco top-1M share are: Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*), Generic / unmatched (mail.*) (as of 2026-09-13).
Largest mailbox providers in this category
Google Workspace (21.67%) · Microsoft 365 (16.97%) · Unknown / Other (6.61%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.94%) · Proofpoint (1.88%) · Cloudflare Email Routing (1.75%) · Yandex 360 (1.61%) · Mimecast (1.46%) · Hostinger (1.27%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 148,813 domains.