OpenSRS (Tucows) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), OpenSRS (Tucows) is the mailbox provider for 1,676 domains — 0.25% of 675,489 domains with MX records. Its strongest TLD is .com (65.9% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What OpenSRS (Tucows) represents in this dataset
Tucows wholesale mail platform for resellers.
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 OpenSRS (Tucows)
Across 94 distinct TLDs its top three are .com (65.9%), .net (6.7%), .org (4.8%) — together 77.4% of the 1,676 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Wild West Domains Forwarder (ESP, 90 domains, 5.4% of them), followed by Amazon SES (3.4%). 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 OpenSRS (Tucows)
What else the same 1,676 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of OpenSRS (Tucows) users |
|---|---|---|---|
| ESP | Wild West Domains Forwarder | 90 | 5.4% |
| ESP | Amazon SES | 57 | 3.4% |
| ESP | Mailgun | 49 | 2.9% |
| ESP | Zendesk | 22 | 1.3% |
| ESP | Mailchimp | 21 | 1.3% |
| ESP | MailerLite | 20 | 1.2% |
| ESP | SendGrid (Twilio) | 20 | 1.2% |
| ESP | Mandrill | 18 | 1.1% |
| ESP | Campaign Monitor | 9 | 0.5% |
| ESP | HubSpot | 9 | 0.5% |
TLD distribution (top 30 of 94)
Frequently asked questions
How many domains use OpenSRS (Tucows)?
1,676 domains in the Tranco top-1M use OpenSRS (Tucows) as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is OpenSRS (Tucows)'s market share?
OpenSRS (Tucows) holds 0.25% 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 OpenSRS (Tucows)?
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 1,676 domains.