Cadmium SaaS sender
According to Live Direct Marketing's daily Tranco top-1M scan (September 18, 2026), Cadmium is the SaaS sender for 147 domains — 0.02% of 637,944 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 147 domains in the Tranco top-1M use Cadmium (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-18 — recomputed every day.
- Strongest TLD: .org (83.0% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: SaaS sender.
Why Cadmium appears in this category
Cadmium — event/conference content management.
We classify it as a SaaS sender from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
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.
Where Cadmium sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 23 | 15.6% |
| Top 1,000,000 | 123 | 83.7% |
| Unranked | 1 | 0.7% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .org | 122 | 83.0% | |
| .com | 24 | 16.3% | |
| .net | 1 | 0.7% |
What Cadmium users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 147 domains.
| Type | Service | Domains | Share of Cadmium users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 84 | 57.1% |
| Mailbox | Mimecast | 19 | 12.9% |
| Mailbox | Google Workspace | 13 | 8.8% |
| Mailbox | Barracuda | 10 | 6.8% |
| Mailbox | Proofpoint Essentials | 8 | 5.4% |
| Mailbox | Generic / unmatched (mx*.*) | 4 | 2.7% |
Cadmium and Microsoft 365 integration patterns
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) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
What is Cadmium and do I need to account for it in email testing or sender assessment?
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.
How many domains use Cadmium?
147 domains in the Tranco top-1M use Cadmium as their SaaS sender as of September 18, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Cadmium common enough to affect email deliverability testing?
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.
Which countries or TLDs use Cadmium most?
Cadmium's largest TLD is .org (83.0% of its domains); it appears across 3 TLDs in total.