According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Microsoft 365 China is the email service provider (ESP) for 156 domains — 0.03% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Microsoft 365 China is Microsoft's cloud-hosted productivity platform for the Chinese market, offering email, calendar, and collaboration tools. It is operated by Microsoft in compliance with China's regulatory requirements for cloud service providers and data residency.
The SPF footprint for Microsoft 365 China appears concentrated in the long tail of smaller websites rather than major enterprises, predominantly on .com domains and often alongside less common SPF mechanisms. This pattern suggests Microsoft 365 China attracts smaller or less mainstream email senders, which can affect how mail systems categorise and route messages from these domains.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.6% |
| Top 10,000 | 4 | 2.6% |
| Top 100,000 | 33 | 21.2% |
| Top 1,000,000 | 102 | 65.4% |
| Unranked | 16 | 10.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 92 | 59.0% | |
| .cn | 29 | 18.6% | |
| .com.cn | 20 | 12.8% | |
| .io | 4 | 2.6% | |
| .net | 2 | 1.3% | |
| .com.br | 2 | 1.3% | |
| .com.hk | 1 | 0.6% | |
| .jp | 1 | 0.6% | |
| .co | 1 | 0.6% | |
| .ai | 1 | 0.6% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 156 domains.
| Type | Service | Domains | Share of Microsoft 365 China users |
|---|---|---|---|
| Mailbox | Unknown / Other | 113 | 72.4% |
| Mailbox | Self-Hosted | 24 | 15.4% |
| Mailbox | QQ Mail (Tencent) | 3 | 1.9% |
| Mailbox | Google Workspace | 3 | 1.9% |
| Mailbox | Lark / Feishu (ByteDance) | 3 | 1.9% |
| Mailbox | Microsoft 365 | 2 | 1.3% |
| ESP | Zendesk | 9 | 5.8% |
| ESP | Mandrill | 6 | 3.8% |
| ESP | Alibaba DirectMail | 5 | 3.2% |
| ESP | Salesforce | 4 | 2.6% |
Domains using Microsoft 365 China SPF includes typically cluster alongside other less common authentication mechanisms, a pattern that can disadvantage senders when receiving systems encounter unfamiliar SPF configurations. Mail systems may apply stricter filtering to such domains, even when the underlying authentication is valid; maintaining a clean, minimal SPF record and avoiding redundant includes improves deliverability for smaller senders using this platform.
See the full Microsoft 365 China data page (KPI cards, trend, sample domains) →
Microsoft 365 China is a cloud email platform used primarily by smaller sites; domains using its SPF includes typically appear alongside other less common authentication mechanisms. This long-tail concentration may result in tighter filtering from receivers unfamiliar with the pattern, so senders should verify their SPF syntax is clean and minimise redundant authentication mechanisms.
156 domains in the Tranco top-1M use Microsoft 365 China as their email service provider (ESP) as of July 13, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Microsoft 365 China accounts for 0.03% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Microsoft 365 China's largest TLD is .com (59.0% of its domains); it appears across 13 TLDs in total.