According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), SchoolMessenger is the SaaS sender for 250 domains — 0.04% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
SchoolMessenger is a SaaS platform that handles email delivery on behalf of schools and educational institutions. Organisations use it to send communications from their own domains, delegating the infrastructure of message sending—and the associated authentication and deliverability—to the platform.
In email infrastructure scans, SchoolMessenger appears predominantly amongst smaller and mid-sized organisations, particularly in the .org space, and is often found alongside Google Workspace. This pattern indicates that if you are testing email deliverability or administering inbound mail for a school or non-profit, you are likely to encounter SchoolMessenger SPF records—and that such organisations tend to be in the smaller-to-mid market segment rather than enterprise.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 11 | 4.4% |
| Top 1,000,000 | 209 | 83.6% |
| Unranked | 30 | 12.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .org | 117 | 46.8% | |
| .ca | 39 | 15.6% | |
| .us | 29 | 11.6% | |
| .net | 29 | 11.6% | |
| .com | 20 | 8.0% | |
| .edu | 15 | 6.0% | |
| .gr | 1 | 0.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 250 domains.
| Type | Service | Domains | Share of SchoolMessenger users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 98 | 39.2% |
| Mailbox | Google Workspace | 95 | 38.0% |
| Mailbox | Barracuda | 11 | 4.4% |
| Mailbox | Self-Hosted | 11 | 4.4% |
| Mailbox | Proofpoint | 10 | 4.0% |
| Mailbox | Unknown / Other | 9 | 3.6% |
SchoolMessenger appears in SPF records primarily at smaller and mid-sized organisations, many of them in the .org sector. It is commonly deployed alongside Google Workspace, a pattern that suggests schools and non-profits often maintain Google Workspace for general email whilst using SchoolMessenger for bulk, transactional, or alert-based sends. When both services are authorised in an organisation's SPF record and properly authenticated with DKIM or DMARC, mail infrastructure functions correctly; however, this layering of multiple senders increases the importance of explicit authentication configuration, since any misalignment in SPF, DKIM policy, or DMARC enforcement can fragment the organisation's sending reputation across multiple services.
See the full SchoolMessenger data page (KPI cards, trend, sample domains) →
SchoolMessenger is a SaaS email delivery platform used primarily by schools and non-profit organisations to send communications from their own domains. It appears in email authentication records (SPF) because these organisations have authorised it to send mail on their behalf.
250 domains in the Tranco top-1M use SchoolMessenger as their SaaS sender as of July 12, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
SchoolMessenger accounts for 0.04% 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.
SchoolMessenger's largest TLD is .org (46.8% of its domains); it appears across 7 TLDs in total.