Microsoft 365 US Gov email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), Microsoft 365 US Gov is the email service provider (ESP) for 295 domains — 0.05% of 637,677 SPF-publishing domains. Its strongest TLD is .com (85.8% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-14 DNS snapshot.
What Microsoft 365 US Gov represents in this dataset
Microsoft 365 — US Government Community Cloud.
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 2026-09-14 snapshot shows about Microsoft 365 US Gov
Across 14 distinct TLDs its top three are .com (85.8%), .us (3.1%), .org (3.1%) — together 91.9% of the 295 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 US Government (Mailbox, 237 domains, 80.3% of them), followed by Unknown / Other (8.1%). 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 (2026-09-14); 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 Microsoft 365 US Gov
What else the same 295 domains use — cross-tabulated from the same daily snapshot (2026-09-14).
| Type | Service | Domains | Share of Microsoft 365 US Gov users |
|---|---|---|---|
| Mailbox | Microsoft 365 US Government | 237 | 80.3% |
| Mailbox | Unknown / Other | 24 | 8.1% |
| Mailbox | Google Workspace | 7 | 2.4% |
| Mailbox | Self-Hosted | 6 | 2.0% |
| Mailbox | Microsoft 365 | 6 | 2.0% |
| Mailbox | Proofpoint | 4 | 1.4% |
| ESP | Salesforce | 24 | 8.1% |
| ESP | Amazon SES | 23 | 7.8% |
| ESP | Mailgun | 13 | 4.4% |
| ESP | HubSpot | 12 | 4.1% |
TLD distribution (top 14 of 14)
Frequently asked questions
How many domains use Microsoft 365 US Gov?
295 domains in the Tranco top-1M use Microsoft 365 US Gov as their email service provider (ESP) as of September 14, 2026, according to Live Direct Marketing's daily DNS scan.
What is Microsoft 365 US Gov's market share?
Microsoft 365 US Gov holds 0.05% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-14). The number is recomputed every day.
What are the biggest alternatives to Microsoft 365 US Gov?
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 2026-09-14).
Largest email service provider (ESP)s in this category
Amazon SES (6.16%) · SendGrid (Twilio) (4.62%) · Mailgun (4.00%) · Zendesk (3.75%) · Mailchimp (3.57%) · Mandrill (3.24%) · HubSpot (3.11%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.95%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 295 domains.