Mailbox.org email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Mailbox.org is the mailbox provider for 384 domains — 0.06% of 675,489 domains with MX records. Its strongest TLD is .de (34.4% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What Mailbox.org represents in this dataset
Berlin mailbox/groupware with strong GDPR posture.
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 2026-09-24 snapshot shows about Mailbox.org
Across 49 distinct TLDs its top three are .de (34.4%), .com (21.1%), .org (9.1%) — together 64.6% of the 384 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, 25 domains, 6.5% of them), followed by Constant Contact (3.9%). 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 (2026-09-24); 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 Mailbox.org
What else the same 384 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Mailbox.org users |
|---|---|---|---|
| ESP | Amazon SES | 25 | 6.5% |
| ESP | Constant Contact | 15 | 3.9% |
| ESP | Brevo (ex-Sendinblue) | 14 | 3.6% |
| ESP | Zendesk | 13 | 3.4% |
| ESP | Mailjet (Sinch) | 12 | 3.1% |
| ESP | Newsletter2Go (Brevo) | 6 | 1.6% |
| ESP | Mailchimp | 5 | 1.3% |
| ESP | Mailgun | 4 | 1.0% |
| ESP | Scaleway TEM | 3 | 0.8% |
| ESP | Postmark | 3 | 0.8% |
TLD distribution (top 30 of 49)
Frequently asked questions
How many domains use Mailbox.org?
384 domains in the Tranco top-1M use Mailbox.org as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Mailbox.org's market share?
Mailbox.org holds 0.06% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Mailbox.org?
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 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 384 domains.