MailChannels email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), MailChannels is the email service provider (ESP) for 6,427 domains — 1.02% of 631,089 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 6,427 domains in the Tranco top-1M use MailChannels (1.02% of SPF-publishing domains).
- Snapshot date: 2026-09-11 — recomputed every day.
- 30-day share change: -0.07 pp.
- Strongest TLD: .com (54.1% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: Self-Hosted.
- Directory category: email forwarding service.
Why MailChannels appears in this category
Canadian outbound relay used by Cloudflare and many hosting providers.
We classify it as a email forwarding service 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.
MailChannels is an email relay service positioned as a third-party SMTP provider for organisations that need outbound mail delivery infrastructure. It appears in SPF records as an authorised sending mechanism, meaning domain owners have delegated their mail delivery to MailChannels' infrastructure.
MailChannels' footprint is concentrated in smaller organisations and self-hosted platforms, particularly across .com domains, rather than amongst major brands. This pattern reflects its positioning as a practical relay solution for organisations running their own mail infrastructure but outsourcing the delivery layer. For senders and deliverability professionals, MailChannels is a common variable in the mid-market and self-hosted segment—understanding its reputation and authentication posture is important when diagnosing delivery issues or auditing sender alignment.
Where MailChannels sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 4 | 0.1% |
| Top 10,000 | 23 | 0.4% |
| Top 100,000 | 309 | 4.8% |
| Top 1,000,000 | 5,968 | 92.9% |
| Unranked | 123 | 1.9% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 3,480 | 54.1% | |
| .org | 551 | 8.6% | |
| .net | 352 | 5.5% | |
| .com.br | 120 | 1.9% | |
| .id | 106 | 1.6% | |
| .com.au | 98 | 1.5% | |
| .co.uk | 90 | 1.4% | |
| .ca | 70 | 1.1% | |
| .co.za | 63 | 1.0% | |
| .nl | 55 | 0.9% |
What MailChannels users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 6,427 domains.
| Type | Service | Domains | Share of MailChannels users |
|---|---|---|---|
| Mailbox | Self-Hosted | 2,484 | 38.6% |
| Mailbox | Google Workspace | 907 | 14.1% |
| Mailbox | MailChannels | 856 | 13.3% |
| Mailbox | Microsoft 365 | 665 | 10.3% |
| Mailbox | Unknown / Other | 336 | 5.2% |
| Mailbox | DreamHost | 315 | 4.9% |
| ESP | SpamExperts (AntiSpamCloud) | 267 | 4.2% |
| ESP | Amazon SES | 259 | 4.0% |
| ESP | SendGrid (Twilio) | 233 | 3.6% |
| ESP | Mailchimp | 226 | 3.5% |
Reputation delegation and third-party relay dependency
When organisations use MailChannels to relay outbound mail, their sender reputation becomes intertwined with MailChannels' network reputation and policies. If MailChannels' IP ranges incur complaints or blocklist entries, it affects all senders relying on that relay, regardless of their individual sending practices. Conversely, outsourcing to a managed relay reduces the burden of maintaining dedicated IP reputation in-house. Monitoring feedback loops, SPF and DKIM alignment, and MailChannels' IP reputation is essential for organisations routing through the service, and for deliverability professionals supporting such senders.
See the full MailChannels data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
What should I know about MailChannels when auditing sender infrastructure?
MailChannels is a common relay for self-hosted organisations, so it frequently appears in SPF records and mail headers. When auditing senders using MailChannels, verify proper DKIM and SPF alignment, check MailChannels' current IP reputation, and understand that the sender's deliverability is partially dependent on MailChannels' network standing.
How many domains use MailChannels?
6,427 domains in the Tranco top-1M use MailChannels as their email service provider (ESP) as of September 11, 2026 (1.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is MailChannels common enough to affect email deliverability testing?
MailChannels accounts for 1.02% 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.
Is MailChannels growing or declining?
MailChannels is declining — its share moved -0.07 pp over the last 30 days (as of September 11, 2026).
Which countries or TLDs use MailChannels most?
MailChannels's largest TLD is .com (54.1% of its domains); it appears across 229 TLDs in total.