LibraESVA email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), LibraESVA is the email service provider (ESP) for 177 domains — 0.03% of 637,677 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 177 domains in the Tranco top-1M use LibraESVA (0.03% of SPF-publishing domains).
- Snapshot date: 2026-09-14 — recomputed every day.
- Strongest TLD: .com (40.1% of its domains).
- Most co-used service: EmailSecurity.app gateway.
- Directory category: email security gateway.
Why LibraESVA appears in this category
Libra Esva — email security gateway (cloud).
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.
LibraESVA is an email service provider that handles message transmission and delivery for customer organisations. It operates typically as a backend sending service accessed via API or SMTP integration.
The infrastructure shows a specific pattern: adoption concentrated in smaller and mid-market organisations rather than the largest global brands, with international presence spread across multiple countries and top-level domains, predominantly .com. A characteristic deployment pattern pairs LibraESVA with EmailSecurity.app, a gateway service, suggesting these sites use a layered sending stack in which security and compliance processing occurs upstream before final delivery.
Where LibraESVA sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 13 | 7.3% |
| Top 1,000,000 | 162 | 91.5% |
| Unranked | 2 | 1.1% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 71 | 40.1% | |
| .co.uk | 26 | 14.7% | |
| .org | 23 | 13.0% | |
| .ro | 5 | 2.8% | |
| .gr | 5 | 2.8% | |
| .ie | 5 | 2.8% | |
| .org.uk | 4 | 2.3% | |
| .it | 4 | 2.3% | |
| .net | 3 | 1.7% | |
| .de | 3 | 1.7% |
What LibraESVA users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 177 domains.
| Type | Service | Domains | Share of LibraESVA users |
|---|---|---|---|
| Mailbox | EmailSecurity.app gateway | 168 | 94.9% |
| Mailbox | Microsoft 365 | 8 | 4.5% |
| Mailbox | Unknown / Other | 1 | 0.6% |
| ESP | Mandrill | 18 | 10.2% |
| ESP | Mailgun | 17 | 9.6% |
| ESP | Amazon SES | 16 | 9.0% |
| ESP | SendGrid (Twilio) | 16 | 9.0% |
Authentication across layered sending stacks
Organisations routing mail through both EmailSecurity.app and LibraESVA must configure authentication (SPF, DKIM, DMARC) to account for both intermediaries; mail passing through both layers generates multiple signatures and authentication touchpoints, each of which must align with published policies. Receiving systems validating such mail require clarity on the complete chain to avoid false authentication failures or policy rejections at intermediate hops.
See the full LibraESVA data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email deliverability against LibraESVA specifically?
Yes, if you use LibraESVA in your sending stack. If it is paired with a gateway service, test the combined configuration to catch issues at multi-layer boundaries.
How many domains use LibraESVA?
177 domains in the Tranco top-1M use LibraESVA as their email service provider (ESP) as of September 14, 2026 (0.03% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is LibraESVA common enough to affect email deliverability testing?
LibraESVA 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 LibraESVA most?
LibraESVA's largest TLD is .com (40.1% of its domains); it appears across 34 TLDs in total.