Zix SMB Hosted email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Zix SMB Hosted is the email service provider (ESP) for 94 domains — 0.01% of 631,089 SPF-publishing domains. Its strongest TLD is .com (67.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-11 DNS snapshot.
What Zix SMB Hosted represents in this dataset
Zix (OpenText) — SMB email encryption + security.
Directory category: Gateway. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-11 snapshot shows about Zix SMB Hosted
Across 10 distinct TLDs its top three are .com (67.0%), .org (16.0%), .gov (5.3%) — together 88.3% of the 94 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 Microsoft 365 (Mailbox, 29 domains, 30.9% of them), followed by Google Workspace (19.1%). Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-11); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Zix SMB Hosted
What else the same 94 domains use — cross-tabulated from the same daily snapshot (2026-09-11).
| Type | Service | Domains | Share of Zix SMB Hosted users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 29 | 30.9% |
| Mailbox | Google Workspace | 18 | 19.1% |
| Mailbox | Unknown / Other | 16 | 17.0% |
| Mailbox | Mimecast | 11 | 11.7% |
| Mailbox | Proofpoint | 7 | 7.4% |
| Mailbox | Barracuda | 7 | 7.4% |
| ESP | Salesforce | 14 | 14.9% |
| ESP | SendGrid (Twilio) | 12 | 12.8% |
| ESP | Amazon SES | 11 | 11.7% |
| ESP | Mailchimp | 9 | 9.6% |
TLD distribution (top 10 of 10)
Frequently asked questions
How many domains use Zix SMB Hosted?
94 domains in the Tranco top-1M use Zix SMB Hosted as their email service provider (ESP) as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is Zix SMB Hosted's market share?
Zix SMB Hosted holds 0.01% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
What are the biggest alternatives to Zix SMB Hosted?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-09-11).
Largest email service provider (ESP)s in this category
Amazon SES (6.17%) · SendGrid (Twilio) (4.63%) · Mailgun (4.00%) · Zendesk (3.76%) · Mailchimp (3.56%) · Mandrill (3.24%) · HubSpot (3.10%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.93%)
Domain sample (top 94 by Tranco rank)
Showing 94 of 94 domains.