Porkbun email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 7, 2026), Porkbun is the email service provider (ESP) for 311 domains — 0.05% of 632,414 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 311 domains in the Tranco top-1M use Porkbun (0.05% of SPF-publishing domains).
- Snapshot date: 2026-09-07 — recomputed every day.
- Strongest TLD: .com (59.5% of its domains).
- Most co-used service: Porkbun Email Forwarding.
- Directory category: email forwarding service.
Why Porkbun appears in this category
Porkbun registrar SPF and email forwarding.
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.
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.
Where Porkbun sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 3 | 1.0% |
| Top 100,000 | 23 | 7.4% |
| Top 1,000,000 | 280 | 90.0% |
| Unranked | 5 | 1.6% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 185 | 59.5% | |
| .net | 18 | 5.8% | |
| .org | 9 | 2.9% | |
| .io | 8 | 2.6% | |
| .ai | 6 | 1.9% | |
| .dev | 6 | 1.9% | |
| .info | 6 | 1.9% | |
| .cc | 5 | 1.6% | |
| .gg | 4 | 1.3% | |
| .app | 4 | 1.3% |
What Porkbun users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 311 domains.
| Type | Service | Domains | Share of Porkbun users |
|---|---|---|---|
| Mailbox | Porkbun Email Forwarding | 263 | 84.6% |
| Mailbox | Google Workspace | 10 | 3.2% |
| Mailbox | Self-Hosted | 4 | 1.3% |
| Mailbox | Cloudflare Email Routing | 3 | 1.0% |
| Mailbox | Unknown / Other | 2 | 0.6% |
| Mailbox | iCloud Mail | 2 | 0.6% |
| ESP | Brevo (ex-Sendinblue) | 4 | 1.3% |
| ESP | Amazon SES | 3 | 1.0% |
| ESP | Cloudflare Email Routing | 3 | 1.0% |
| ESP | Mailjet (Sinch) | 2 | 0.6% |
Email forwarding architecture and DMARC alignment
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) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
Should I test email deliverability against Porkbun's infrastructure?
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.
How many domains use Porkbun?
311 domains in the Tranco top-1M use Porkbun as their email service provider (ESP) as of September 7, 2026 (0.05% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Porkbun common enough to affect email deliverability testing?
Porkbun accounts for 0.05% 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 Porkbun most?
Porkbun's largest TLD is .com (59.5% of its domains); it appears across 58 TLDs in total.