Resources

Understand the check. Use the result well.

Short, practical material for anyone cleaning a list before a campaign. No inflated accuracy claims. No mystery labels.

Library

Start with the question in front of you.

Learn the basics, inspect the product workflow or look up a result category.

Guide

Learn what a verifier can test, why some results stay uncertain and how to use each category before a campaign.

Product walkthrough

Follow the complete CSV journey from account creation and column mapping to review and download.

Reference

Get direct answers about Deliverable, Risky, High risk, Catch-all, Undeliverable and Unknown.

Product

See the checks, export fields, free single-address offer and account controls available today.

Comparison

Review a factual comparison of public pricing, advertised promotions, workflows and verification features.

“Unknown” is useful information. It tells you the receiving system did not provide enough evidence for a reliable mailbox decision.

Verification has limits. Good list decisions begin by keeping those limits visible.