According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Cadmium is the SaaS sender for 150 domains — 0.02% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Cadmium is a software-as-a-service platform that handles email sending on behalf of client domains. Senders and domain administrators enable it through SPF include mechanisms in their DNS records, authorising Cadmium to transmit mail on their behalf.
Cadmium's deployment footprint is concentrated amongst smaller and mid-sized organisations, particularly in the non-profit (.org) sector, and frequently co-occurs with Microsoft 365 environments. This pattern — prevalence in the long tail rather than amongst the largest global brands — has specific implications for email senders, receivers, and infrastructure analysts assessing mail quality, authentication robustness, and reputation across sender populations.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 21 | 14.0% |
| Top 1,000,000 | 121 | 80.7% |
| Unranked | 8 | 5.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .org | 126 | 84.0% | |
| .com | 23 | 15.3% | |
| .net | 1 | 0.7% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 150 domains.
| Type | Service | Domains | Share of Cadmium users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 83 | 55.3% |
| Mailbox | Mimecast | 19 | 12.7% |
| Mailbox | Google Workspace | 14 | 9.3% |
| Mailbox | Proofpoint Essentials | 10 | 6.7% |
| Mailbox | Barracuda | 9 | 6.0% |
| Mailbox | Generic / unmatched (mx*.*) | 4 | 2.7% |
Cadmium appears frequently in DNS records of organisations that also rely on Microsoft 365 for primary email and collaboration services. This co-occurrence indicates that Cadmium functions as a supplementary transactional or automated-mail service rather than as a primary email infrastructure replacement. For deliverability teams, this pattern is significant: many Cadmium senders already have standing reputation relationships with a major email provider, which can influence how receiving systems categorise the traffic, score sender reputation, and handle bounces and feedback loops.
See the full Cadmium data page (KPI cards, trend, sample domains) →
Cadmium is a transactional email platform used by smaller organisations and non-profits, often alongside Microsoft 365. Senders should prioritise SPF configuration and reputation monitoring; receivers should expect traffic from smaller sender populations rather than major brands.
150 domains in the Tranco top-1M use Cadmium as their SaaS sender as of July 13, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Cadmium 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.
Cadmium's largest TLD is .org (84.0% of its domains); it appears across 3 TLDs in total.