Blackbaud email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 16, 2026), Blackbaud is the email service provider (ESP) for 1,035 domains — 0.16% of 634,905 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 1,035 domains in the Tranco top-1M use Blackbaud (0.16% of SPF-publishing domains).
- Snapshot date: 2026-09-16 — recomputed every day.
- Strongest TLD: .org (53.5% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: SaaS sender.
Why Blackbaud appears in this category
US fundraising / nonprofit CRM (outboundmail.blackbaud.net).
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.
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.
Where Blackbaud sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 7 | 0.7% |
| Top 100,000 | 113 | 10.9% |
| Top 1,000,000 | 915 | 88.4% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .org | 554 | 53.5% | |
| .edu | 280 | 27.1% | |
| .ca | 71 | 6.9% | |
| .com | 43 | 4.2% | |
| .org.uk | 28 | 2.7% | |
| .au | 17 | 1.6% | |
| .net | 10 | 1.0% | |
| .ac.uk | 8 | 0.8% | |
| .uk | 5 | 0.5% | |
| .nz | 3 | 0.3% |
What Blackbaud users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,035 domains.
| Type | Service | Domains | Share of Blackbaud users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 611 | 59.0% |
| Mailbox | Google Workspace | 119 | 11.5% |
| Mailbox | Barracuda | 58 | 5.6% |
| Mailbox | Proofpoint | 46 | 4.4% |
| Mailbox | Mimecast | 44 | 4.3% |
| Mailbox | Unknown / Other | 40 | 3.9% |
| ESP | SendGrid (Twilio) | 173 | 16.7% |
| ESP | Mailchimp | 144 | 13.9% |
| ESP | Blackbaud Luminate (Convio) | 143 | 13.8% |
| ESP | Amazon SES | 140 | 13.5% |
Authentication alignment when Blackbaud coexists with Microsoft 365
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) →
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Frequently asked questions
Why is Blackbaud showing up in my domain's SPF record?
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.
How many domains use Blackbaud?
1,035 domains in the Tranco top-1M use Blackbaud as their email service provider (ESP) as of September 16, 2026 (0.16% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Blackbaud common enough to affect email deliverability testing?
Blackbaud accounts for 0.16% 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 Blackbaud most?
Blackbaud's largest TLD is .org (53.5% of its domains); it appears across 23 TLDs in total.