According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Blackbaud is the email service provider (ESP) for 1,040 domains — 0.17% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Blackbaud is a cloud-based email, CRM, and fundraising platform operated by Blackbaud Inc., focused primarily on nonprofit organisations, educational institutions, and mid-market enterprises requiring constituent management and targeted email campaigns.
Its SPF footprint concentrates in the .org domain space among smaller and medium-sized sites, frequently appearing alongside Microsoft 365 in the same organisation's mailflow. This pattern reflects a common hybrid setup: mission-driven organisations using Blackbaud for engagement and fundraising whilst maintaining Microsoft 365 for general business email, creating a multi-sender authentication landscape that demands careful SPF and DKIM configuration.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 8 | 0.8% |
| Top 100,000 | 118 | 11.3% |
| Top 1,000,000 | 854 | 82.1% |
| Unranked | 60 | 5.8% |
| TLD | Domains | Share | |
|---|---|---|---|
| .org | 560 | 53.8% | |
| .edu | 287 | 27.6% | |
| .ca | 67 | 6.4% | |
| .com | 46 | 4.4% | |
| .org.uk | 26 | 2.5% | |
| .au | 15 | 1.4% | |
| .net | 10 | 1.0% | |
| .ac.uk | 8 | 0.8% | |
| .uk | 5 | 0.5% | |
| .gov | 2 | 0.2% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,040 domains.
| Type | Service | Domains | Share of Blackbaud users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 599 | 57.6% |
| Mailbox | Google Workspace | 128 | 12.3% |
| Mailbox | Barracuda | 66 | 6.3% |
| Mailbox | Mimecast | 49 | 4.7% |
| Mailbox | Proofpoint | 45 | 4.3% |
| Mailbox | Unknown / Other | 42 | 4.0% |
| ESP | SendGrid (Twilio) | 173 | 16.6% |
| ESP | Mailchimp | 144 | 13.8% |
| ESP | Blackbaud Luminate (Convio) | 140 | 13.5% |
| ESP | Amazon SES | 139 | 13.4% |
Organisations using Blackbaud alongside Microsoft 365 must authorise multiple senders via SPF includes on the same domain, which quickly consumes the practical SPF lookup limit. Proper DKIM and DMARC alignment becomes critical to prevent authentication failures in inbound filters. Administrators should consider subdomain splitting for Blackbaud campaigns or strict DMARC p=reject enforcement to ensure only authenticated mail reaches recipients' inboxes.
See the full Blackbaud data page (KPI cards, trend, sample domains) →
Blackbaud is an email service provider that your organisation has authorised to send email on your domain's behalf, commonly in nonprofits and education. If you did not authorise it, investigate whether a department is using it for fundraising or communications independently.
1,040 domains in the Tranco top-1M use Blackbaud as their email service provider (ESP) as of July 13, 2026 (0.17% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Blackbaud accounts for 0.17% 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.
Blackbaud's largest TLD is .org (53.8% of its domains); it appears across 22 TLDs in total.