CSOF (DE) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), CSOF (DE) is the mailbox provider for 462 domains — 0.07% of 675,489 domains with MX records. Its strongest TLD is .com (44.4% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What CSOF (DE) represents in this dataset
Niche German hosting (Computer Service Online Folkesund).
Directory category: Hosting. 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 CSOF (DE)
Across 69 distinct TLDs its top three are .com (44.4%), .net (11.7%), .biz (6.3%) — together 62.3% of the 462 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Mailspike (ESP, 448 domains, 97.0% of them). 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 CSOF (DE)
What else the same 462 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of CSOF (DE) users |
|---|---|---|---|
| ESP | Mailspike | 448 | 97.0% |
TLD distribution (top 30 of 69)
Frequently asked questions
How many domains use CSOF (DE)?
462 domains in the Tranco top-1M use CSOF (DE) as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is CSOF (DE)'s market share?
CSOF (DE) holds 0.07% 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 CSOF (DE)?
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 462 domains.