According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Mailspike is the email service provider (ESP) for 900 domains — 0.15% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Mailspike is an email service provider whose infrastructure is authorised to send mail on behalf of other organisations via SPF includes. It appears across the Tranco top-1 million domain dataset as part of the distributed email sending ecosystem.
Analysis of Mailspike's footprint reveals concentration among smaller and mid-market websites rather than enterprise deployments, with international adoption led by .com domains. The service is commonly paired with self-hosted mail infrastructure, indicating use by organisations that maintain their own email systems but supplement sending through a managed provider for redundancy, capacity, or operational flexibility.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.1% |
| Top 100,000 | 183 | 20.3% |
| Top 1,000,000 | 635 | 70.6% |
| Unranked | 81 | 9.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 300 | 33.3% | |
| .biz | 159 | 17.7% | |
| .net | 72 | 8.0% | |
| .in | 34 | 3.8% | |
| .xyz | 22 | 2.4% | |
| .shop | 19 | 2.1% | |
| .ru | 18 | 2.0% | |
| .org | 16 | 1.8% | |
| .top | 16 | 1.8% | |
| .club | 14 | 1.6% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 900 domains.
| Type | Service | Domains | Share of Mailspike users |
|---|---|---|---|
| Mailbox | CSOF (DE) | 482 | 53.6% |
| Mailbox | Self-Hosted | 418 | 46.4% |
When a domain authorises both in-house and Mailspike sending sources in its SPF record, mail receivers treat each as an independent source with its own reputation history. Mailspike's reputation score reflects the aggregate behaviour of all its customers, so poor sending practices by other users of the service can negatively affect an individual organisation's deliverability. Senders using Mailspike alongside self-hosted mail should monitor both infrastructure sources independently against reputation databases and blacklists to detect shared reputation degradation early.
See the full Mailspike data page (KPI cards, trend, sample domains) →
It means your organisation has authorised Mailspike to send email on your domain's behalf, typically as a secondary sending route, redundancy option, or integrated email service. Any mail sent through Mailspike's infrastructure will carry both your domain's reputation and Mailspike's own sender reputation.
900 domains in the Tranco top-1M use Mailspike as their email service provider (ESP) as of July 13, 2026 (0.15% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Mailspike accounts for 0.15% 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.
Mailspike's largest TLD is .com (33.3% of its domains); it appears across 102 TLDs in total.