Introducing the IPQS Email Verification Database

High-volume teams often face a trade-off between the convenience of a cloud API and the speed, privacy, and control of keeping data in-house. The IPQS Email Verification Database removes that trade-off. It is a self-hosted version of our email validation and email risk scoring technology, delivered as a downloadable dataset you run inside your own systems. There are no external requests, no per-lookup network latency, and no user data leaving your infrastructure.

It follows the same model as the IPQS IP Reputation Database, which brings on-premise IP risk data to internal systems. Together they let you validate users and traffic locally, in real time, and at scale.

What is the Email Verification Database?

The Email Verification Database is a downloadable copy of the full IPQS email intelligence dataset, refreshed on the schedule you need, daily, weekly, or monthly, and built for local deployment. Your systems query the same data behind our email validation API without ever making an external call. It surfaces the signals that matter for clean lists and fraud prevention:

•       Temporary and disposable email addresses

•       Known spam traps and honeypots

•       Addresses tied to automated or scripted sign-ups

•       Addresses linked to abusive or suspicious behavior

•       Domain-level issues that hurt deliverability

Because the data lives on your hardware, lookups happen instantly, even under heavy load.

Who is it for?

The database is built for teams that put a premium on control, speed, and accuracy, including:

•       Cybersecurity teams monitoring email-based risk

•       Email marketing and deliverability platforms keeping lists clean

•       Financial services preventing fake account creation

•       Lead-generation tools filtering out fake or low-value submissions

•       Engineering teams processing email data at scale in internal tools

Key benefits

•       Full control and data residency. Nothing leaves your environment, which simplifies privacy compliance and reduces third-party exposure.

•       Fast local performance. Local data means instant lookups with no network round-trip, even at high volume.

•       Cleaner lists and better deliverability. Removing invalid and risky addresses before you send lowers bounce rates and protects sender reputation.

•       Fraud prevention at the source. Block the domains and patterns associated with bots, fraud rings, and fake identities during account creation and other key actions.

•       Easy integration. Prebuilt database readers for Go, PHP, Java, Python, and Rust get you running quickly; the getting-started guide walks through setup for real-time, batch, or offline use.

Built for large workloads

The database is structured for volume, whether you process a few thousand addresses or millions a day, with fast lookups that hold up under strict uptime and performance requirements. Updates arrive by secure download or SFTP on your chosen cadence, so your local copy stays current without manual effort.

Database or real-time API: which should you use?

Both draw on the same IPQS email intelligence, so the choice comes down to how you operate. The real-time API is ideal when you want the freshest possible result on a per-event basis and would rather not host data yourself. The Email Verification Database is the better fit when you need maximum throughput, predictable low latency, offline or air-gapped processing, or strict data-residency control. Many teams use both: the API at the live point of entry, and the database for bulk list cleaning and internal analytics.

Frequently asked questions

What is the IPQS Email Verification Database?

A downloadable, self-hosted copy of the IPQS email intelligence dataset that lets you score and validate email addresses locally, without calling an external API.

How often is the database updated?

On the schedule you choose, daily, weekly, or monthly, delivered by secure download or SFTP.

What programming languages are supported?

Prebuilt readers are available for Go, PHP, Java, Python, and Rust, with setup covered in the getting-started guide.

How is it different from the email validation API?

The underlying data is the same. The database runs entirely on your infrastructure for maximum speed and privacy, while the API is a hosted, real-time service.

Does any user data leave my systems?

No. Because the database is hosted locally, lookups never send user data to external servers.

Get started

See how on-premise email intelligence fits your stack. Start a free trial with 1,000 free lookups per month, or schedule a demo to talk through the Email Verification Database with the IPQS team.