The Email Insider's Secret Weapon

Protect Against Bad Actors & Poor Reputations

The rule for decision-making in life and business goes like this: The person with the fewest blind spots wins. It's like being at a poker table where you can see everyone else's cards.

But how do you get there? How do you reduce those blind spots? 

If you're an ESP, CRM, mailbox provider, or whitehat email validation provider, one way is using Blackbox.

We offer exclusive access to a vast quantity of email addresses that have been proven detrimental to email engagement and sender reputation.

It's the missing dataset needed to run preemptive risk assessments and increase revenue. 


Reliable decisioning for better results.
Predict  Abuse

Predict Abuse

Email vendors and senders can separate good sendersfrom the bad before damage to reputation is done.

Avoid Blocklists

Automate Compliance

On a scale of 1-to-5, you can easily identify the risk associated with any email address or any email list.

Fast & Flexible

Boost Deliverability

With a super-fast app and API, and optional on-premise data, we offer a powerful and flexible solution.


BlackBox is available as a cancel-anytime subscription.



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• On-Premise* START 14-DAY FREE TRIAL *On-premise starts at $5,000/mo


Need more volume?

Want to include email verification or managed services?

Contact us, and we'll customize a solution to your needs.

News and Events

The latest from our blog.

How is Email Marketing Weathering COVID-19?

June 16, 2024

If you're currently having to dig yourself out from under a mountain of Amazon boxes, you’re not alone.

Online consumerism in many industries has seen unprecedented, large-scale growth so far this

What’s new in BlackBox – April 2020

June 16, 2024

We're back to share a couple of exciting new features and enhancements to BlackBox. 


Our most recent update was significant to say the least.

Specifically, 146 million email addresses

Why All Email Contacts Aren't Created Equal and the Right Ways to Treat Your Email Opt-Ins

June 16, 2024

This article is published in collaboration with HubSpot which we use to power inbound marketing and CRM for BlackBox.

In the multifaceted universe of email marketing, it's a cardinal truth that not

Avoiding Email Blacklists Just Got Easy

June 16, 2024

We're proud to announce that we've made significant enhancements to BlackBox that were designed to empower any size email sender to easily identify bad email addresses and avoid deliverability

The Democratization of Email Compliance

June 16, 2024

We are thrilled to share some exciting news with our community: BlackBox has recently implemented significant enhancements to our email compliance tools. These improvements are a game-changer,

Email Evolution in Soulful Savannah

June 16, 2024

We're long time supporters of the EEC and this year we’ll be at their Email Evolution Conference in Savannah, Georgia on April 24-26.

Email Evolution is like coming home for the holidays; it's busy,

Email Marketing Predictions 2019 - A Meta View

June 16, 2024

For the 4th year we present a meta data analysis of the predictions made for the coming year by industry experts. This year we gathered 195 predictions and categorized them as presented in the chart

Monitoring Sender Reputation: Why an ESP Must Act Like a Wary Money Lender

June 16, 2024

Sender Reputation and ESP Deliverability

Just as a bank or another kind of lender must thoroughly vet a customer before trusting them with a loan, an ESP needs to know something about a customer

Email Blacklisted? What you need to know

June 16, 2024

Email blacklisted. What now?

Email blacklists are not necessarily a bad thing. I know that's hard to believe if your domain or IP is listed and your email campaigns can't make it out the door. Did

How a data breach affects email deliverability

June 16, 2024

Sadly, data breaches happen everyday.

While we have all been diligently working to protect the privacy of European customers, data breaches have continued to happen. Here's a small sampling.


BlackBox Adds Freemium Plan to Help Improve Email List Scoring for All

June 16, 2024

Freemium. Yes, freemium. It seems like an unlikely path for a market-proven product after years of helping world-class email senders build abuse prevention systems, but that’s exactly what we’re

Is your customer email list good or bad?

June 16, 2024

How To Score a Risky Email List With BlackBox

Have you ever had a customer wanting to use your email marketing platform and you weren’t quite sure of their intent or their savviness of the nuances of

A Curated Look at 2018 Email Marketing Predictions

June 16, 2024

This is the third year we have collected and curated email marketing predictions. It looks as if it's the year of the platform, the emails sent, and the details/design of their content.

The top 4


June 16, 2024

Fall is in full swing and the clocks are rolled back! That means we’re now raking leaves, pruning bushes and cleaning out closets of old clothes as we switch to warmer, more relevant outfits. You and

Spam Traps. Ouch!

June 16, 2024

Spam Traps: Are You Keeping Your Customers Clear of Them? Or Putting Your Deliverability at Risk? Try our spam trap detection service.

If you work in the email industry, I’m assuming you already

Why Not Use Purchased Lists?

June 16, 2024

9 Reasons to Avoid Purchased Email Lists Like the Plague

If you're considering taking a shortcut in your email marketing strategy by purchasing an email list, think again. It's like playing with fire


Please don’t hesitate to get in touch.
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