According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), ADP is the SaaS sender for 116 domains — 0.02% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
ADP is a cloud-based email delivery platform used by organisations to send messages on behalf of their domains. As a software-as-a-service provider, it integrates with customer email infrastructure through SPF (Sender Policy Framework) include mechanisms, which allow domains to delegate sending authority to ADP's mail servers.
ADP's footprint in email authentication data is concentrated among smaller and mid-market sites rather than the largest global brands, and predominantly appears in .com domains. It is most commonly observed alongside Microsoft 365 deployments, suggesting it serves organisations that have adopted Microsoft's productivity suite and require additional email delivery capabilities.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.9% |
| Top 10,000 | 1 | 0.9% |
| Top 100,000 | 26 | 22.4% |
| Top 1,000,000 | 85 | 73.3% |
| Unranked | 3 | 2.6% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 91 | 78.4% | |
| .org | 10 | 8.6% | |
| .com.au | 4 | 3.4% | |
| .edu | 4 | 3.4% | |
| .au | 2 | 1.7% | |
| .net | 1 | 0.9% | |
| .de | 1 | 0.9% | |
| .ca | 1 | 0.9% | |
| .eu | 1 | 0.9% | |
| .nl | 1 | 0.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 116 domains.
| Type | Service | Domains | Share of ADP users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 53 | 45.7% |
| Mailbox | Proofpoint | 24 | 20.7% |
| Mailbox | Google Workspace | 12 | 10.3% |
| Mailbox | Mimecast | 9 | 7.8% |
| Mailbox | Unknown / Other | 5 | 4.3% |
| Mailbox | Self-Hosted | 3 | 2.6% |
Organisations using both ADP and Microsoft 365 must include SPF records for both providers, and DNS query size becomes a practical concern when multiple include mechanisms stack. Each include directive adds resolution overhead; senders should verify their SPF configuration does not exceed the typical DNS answer limits and monitor for potential authentication failures if the query becomes too large.
See the full ADP data page (KPI cards, trend, sample domains) →
Yes—if you send mail through ADP, you must add its SPF include to your domain's SPF record to ensure deliverability and proper authentication. ADP provides the correct include string during customer onboarding.
116 domains in the Tranco top-1M use ADP as their SaaS sender as of July 12, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
ADP accounts for 0.02% 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.
ADP's largest TLD is .com (78.4% of its domains); it appears across 10 TLDs in total.