Cloudflare Email Routing mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Cloudflare Email Routing is the mailbox provider for 11,610 domains — 1.74% of 666,213 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 11,610 domains in the Tranco top-1M use Cloudflare Email Routing (1.74% of domains with MX records).
- Snapshot date: 2026-09-11 — recomputed every day.
- 30-day share change: +0.06 pp.
- Strongest TLD: .com (44.4% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: Cloudflare Email Routing.
- Directory category: email forwarding service.
Why Cloudflare Email Routing appears in this category
Free DNS-based email forwarding from Cloudflare; popular for catch-all and alias setups.
We classify it as a email forwarding service from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Cloudflare Email Routing is a mail forwarding service operated by Cloudflare, a global content delivery and security platform. The service intercepts mail sent to a domain and forwards it to one or more recipient addresses, eliminating the need to run a dedicated mail server.
Cloudflare Email Routing is most prevalent among smaller and mid-market websites rather than large enterprises, distributed across many top-level domains with concentration on .com and English-language sites. For senders targeting such sites, understanding Cloudflare Email Routing's forwarding architecture becomes relevant when troubleshooting deliverability; for recipients, using Cloudflare Email Routing means inbound mail is processed according to Cloudflare's filtering policies rather than a traditional mail server's behaviour.
Where Cloudflare Email Routing sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.0% |
| Top 10,000 | 107 | 0.9% |
| Top 100,000 | 1,096 | 9.4% |
| Top 1,000,000 | 10,321 | 88.9% |
| Unranked | 85 | 0.7% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 5,154 | 44.4% | |
| .net | 815 | 7.0% | |
| .org | 593 | 5.1% | |
| .id | 292 | 2.5% | |
| .io | 235 | 2.0% | |
| .app | 171 | 1.5% | |
| .in | 133 | 1.1% | |
| .com.br | 133 | 1.1% | |
| .co.uk | 128 | 1.1% | |
| .ru | 123 | 1.1% |
What Cloudflare Email Routing users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 11,610 domains.
| Type | Service | Domains | Share of Cloudflare Email Routing users |
|---|---|---|---|
| ESP | Cloudflare Email Routing | 11,346 | 97.7% |
| ESP | Brevo (ex-Sendinblue) | 251 | 2.2% |
| ESP | Amazon SES | 241 | 2.1% |
| ESP | Mailgun | 116 | 1.0% |
| ESP | Mailjet (Sinch) | 99 | 0.9% |
| ESP | SendGrid (Twilio) | 75 | 0.6% |
| ESP | Elastic Email | 69 | 0.6% |
| ESP | Zendesk | 64 | 0.6% |
| ESP | MailerSend | 43 | 0.4% |
| ESP | MailerLite | 39 | 0.3% |
SPF authentication and mail forwarding
Cloudflare Email Routing's forwarding model creates an SPF consideration: if a domain's SPF record does not explicitly authorise Cloudflare's servers as a sender, forwarded mail may fail SPF checks at the destination. Senders using Cloudflare Email Routing must include Cloudflare's IP ranges in their SPF record; recipients should understand that mail will originate from Cloudflare's infrastructure rather than the sender's own servers.
See the full Cloudflare Email Routing data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Do I need to test email deliverability against Cloudflare Email Routing?
No, because Cloudflare Email Routing forwards mail to other providers' mailboxes rather than storing it as a final destination. If you use Cloudflare Email Routing on your own domain, ensure your SPF record permits Cloudflare's servers.
How many domains use Cloudflare Email Routing?
11,610 domains in the Tranco top-1M use Cloudflare Email Routing as their mailbox provider as of September 11, 2026 (1.74% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Cloudflare Email Routing common enough to affect email deliverability testing?
Cloudflare Email Routing accounts for 1.74% of domains with MX records 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.
Is Cloudflare Email Routing growing or declining?
Cloudflare Email Routing is growing — its share moved +0.06 pp over the last 30 days (as of September 11, 2026).
Which countries or TLDs use Cloudflare Email Routing most?
Cloudflare Email Routing's largest TLD is .com (44.4% of its domains); it appears across 386 TLDs in total.