According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Blackboard is the SaaS sender for 398 domains — 0.06% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Blackboard is an educational technology platform that provides learning management systems and digital collaboration tools to schools, universities, and training organisations. It sends transactional emails—course announcements, assignment notifications, administrative messages—on behalf of the institutions that deploy it, which is why Blackboard's mail servers appear in institutional DNS records via SPF include mechanisms.
Blackboard's deployment pattern concentrates on educational institutions and smaller organisations rather than the largest global brands, with particularly strong adoption across .edu domains and international TLDs. Institutions commonly run Blackboard alongside Microsoft 365 for email handling, meaning their email authentication setup must account for both platforms' SPF requirements. For anyone managing mail authentication or evaluating deliverability in an educational setting, Blackboard's SPF configuration is a standard infrastructure consideration.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 5 | 1.3% |
| Top 100,000 | 55 | 13.8% |
| Top 1,000,000 | 325 | 81.7% |
| Unranked | 13 | 3.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .edu | 148 | 37.2% | |
| .org | 80 | 20.1% | |
| .net | 42 | 10.6% | |
| .us | 21 | 5.3% | |
| .ac.uk | 15 | 3.8% | |
| .com | 14 | 3.5% | |
| .es | 11 | 2.8% | |
| .sa | 7 | 1.8% | |
| .au | 6 | 1.5% | |
| .ie | 4 | 1.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 398 domains.
| Type | Service | Domains | Share of Blackboard users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 212 | 53.3% |
| Mailbox | Google Workspace | 85 | 21.4% |
| Mailbox | Barracuda | 23 | 5.8% |
| Mailbox | Self-Hosted | 19 | 4.8% |
| Mailbox | Proofpoint | 17 | 4.3% |
| Mailbox | Mimecast | 16 | 4.0% |
Blackboard is typically deployed in institutions that also use Microsoft 365, requiring both platforms' SPF include mechanisms to coexist in the domain's DNS configuration. This dual-platform setup means institutions must ensure their SPF records properly authorise both mail senders. Organisations running Blackboard should audit their SPF configuration when deploying or updating the platform, to verify that all authorised senders—Blackboard, Microsoft 365, and any others—are included without introducing conflicts or exceeding SPF's technical constraints.
See the full Blackboard data page (KPI cards, trend, sample domains) →
Blackboard is an educational technology platform that sends emails on behalf of institutions that use it; it appears in institutional DNS SPF records because those records must authorise Blackboard's mail servers to authenticate outgoing messages.
398 domains in the Tranco top-1M use Blackboard as their SaaS sender as of July 12, 2026 (0.06% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Blackboard accounts for 0.06% 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.
Blackboard's largest TLD is .edu (37.2% of its domains); it appears across 42 TLDs in total.