Endurance/Newfold Cloudfilter email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Endurance/Newfold Cloudfilter is the email service provider (ESP) for 220 domains — 0.03% of 631,089 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 220 domains in the Tranco top-1M use Endurance/Newfold Cloudfilter (0.03% of SPF-publishing domains).
- Snapshot date: 2026-09-11 — recomputed every day.
- Strongest TLD: .com (60.0% of its domains).
- Most co-used service: Self-Hosted.
- Directory category: email security gateway.
Why Endurance/Newfold Cloudfilter appears in this category
Newfold Digital (Endurance) Cloudfilter mail security.
We classify it as a email security gateway 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.
Endurance/Newfold Cloudfilter is an email filtering and relay service operated by Endurance International Group, a major web-hosting and domain-services conglomerate. It appears in email infrastructure primarily via SPF include mechanisms, indicating its use as an intermediary for outbound mail from hosted websites.
Cloudfilter's footprint skews towards smaller websites and long-tail domains rather than Fortune-500 brands, and concentrates heavily in the .com space. It frequently appears alongside self-hosted email infrastructure, suggesting it fills a niche role in hybrid deployments where organisations operate their own mail servers but outsource filtering or relay to a third party.
Where Endurance/Newfold Cloudfilter sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.5% |
| Top 10,000 | 6 | 2.7% |
| Top 100,000 | 17 | 7.7% |
| Top 1,000,000 | 191 | 86.8% |
| Unranked | 5 | 2.3% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 132 | 60.0% | |
| .in | 32 | 14.5% | |
| .net | 13 | 5.9% | |
| .co.in | 10 | 4.5% | |
| .lk | 6 | 2.7% | |
| .org | 6 | 2.7% | |
| .com.br | 3 | 1.4% | |
| .edu | 2 | 0.9% | |
| .io | 1 | 0.5% | |
| .com.ph | 1 | 0.5% |
What Endurance/Newfold Cloudfilter users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 220 domains.
| Type | Service | Domains | Share of Endurance/Newfold Cloudfilter users |
|---|---|---|---|
| Mailbox | Self-Hosted | 147 | 66.8% |
| Mailbox | Google Workspace | 20 | 9.1% |
| Mailbox | Microsoft 365 | 14 | 6.4% |
| Mailbox | Unknown / Other | 7 | 3.2% |
| Mailbox | MailHostBox | 6 | 2.7% |
| Mailbox | Zoho Mail (IN) | 2 | 0.9% |
| ESP | Salesforce | 14 | 6.4% |
| ESP | Brevo (ex-Sendinblue) | 8 | 3.6% |
| ESP | Mailgun | 3 | 1.4% |
| ESP | SendGrid (Twilio) | 3 | 1.4% |
SPF includes and authentication verification
Because Cloudfilter is typically discovered through SPF include mechanisms—such as include:_netblocks.endurance.com or similar—recipients verifying sender authentication must resolve the full chain to identify which IP ranges are authorised. When testing deliverability against sites using Cloudfilter, confirming that both the primary domain's SPF record and any included Endurance netblocks are correctly configured is essential; misalignment frequently causes authentication failures and hard bounces, particularly for transactional mail from smaller hosting accounts.
See the full Endurance/Newfold Cloudfilter data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Endurance/Newfold Cloudfilter and why would I see it in email headers or SPF records?
Cloudfilter is an email filtering and relay service from Endurance International Group, widely deployed by smaller hosting providers and self-hosted deployments. You will see it in SPF records when a domain routes outbound mail through Endurance's infrastructure, and in mail headers as a relay hop if inbound filtering is also enabled.
How many domains use Endurance/Newfold Cloudfilter?
220 domains in the Tranco top-1M use Endurance/Newfold Cloudfilter as their email service provider (ESP) as of September 11, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Endurance/Newfold Cloudfilter common enough to affect email deliverability testing?
Endurance/Newfold Cloudfilter accounts for 0.03% 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 Endurance/Newfold Cloudfilter most?
Endurance/Newfold Cloudfilter's largest TLD is .com (60.0% of its domains); it appears across 24 TLDs in total.