According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Porkbun is the email service provider (ESP) for 262 domains — 0.04% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Porkbun is a domain registrar that offers email forwarding and basic email services to its customer base. Its email infrastructure is most commonly deployed through the Porkbun Email Forwarding feature, which allows domain owners to receive mail at custom domains without operating independent mail servers.
SPF records and domain authentication evidence suggest Porkbun's email presence is concentrated among smaller-tier websites and .com domains, rather than high-volume senders or major enterprises. This distribution reflects Porkbun's role as an enabler of email routing for SMBs and individuals, not as a commercial email platform for marketing or transactional bulk sending.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 4 | 1.5% |
| Top 100,000 | 18 | 6.9% |
| Top 1,000,000 | 168 | 64.1% |
| Unranked | 72 | 27.5% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 150 | 57.3% | |
| .net | 17 | 6.5% | |
| .org | 10 | 3.8% | |
| .io | 7 | 2.7% | |
| .ai | 5 | 1.9% | |
| .dev | 4 | 1.5% | |
| .info | 4 | 1.5% | |
| .co | 4 | 1.5% | |
| .tv | 4 | 1.5% | |
| .social | 3 | 1.1% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 262 domains.
| Type | Service | Domains | Share of Porkbun users |
|---|---|---|---|
| Mailbox | Porkbun Email Forwarding | 221 | 84.4% |
| Mailbox | Google Workspace | 12 | 4.6% |
| Mailbox | Cloudflare Email Routing | 3 | 1.1% |
| Mailbox | iCloud Mail | 2 | 0.8% |
| Mailbox | Self-Hosted | 2 | 0.8% |
| Mailbox | Zoho Mail | 1 | 0.4% |
| ESP | Amazon SES | 5 | 1.9% |
| ESP | Mailjet (Sinch) | 3 | 1.1% |
| ESP | Cloudflare Email Routing | 3 | 1.1% |
| ESP | Mailgun | 2 | 0.8% |
Porkbun Email Forwarding is the dominant use of its infrastructure, particularly across smaller websites. Inbound mail passes through Porkbun's relay servers en route to the recipient, meaning that Porkbun's SMTP reputation and the sender's DMARC alignment both affect delivery — not just the original sender's reputation.
See the full Porkbun data page (KPI cards, trend, sample domains) →
Porkbun Email Forwarding is used across many smaller websites, so its relay reputation is relevant to delivery if your recipients use Porkbun-forwarding domains. The forwarding service's SMTP reputation becomes a material part of the delivery chain.
262 domains in the Tranco top-1M use Porkbun as their email service provider (ESP) as of July 12, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Porkbun accounts for 0.04% 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.
Porkbun's largest TLD is .com (57.3% of its domains); it appears across 54 TLDs in total.