Glossary
Tracking pixel
A tiny image in an email that records when a message is opened.
ValidReach Team · Updated 2026-10-26
In practice
When the image loads, the sender’s server logs the open. Clients that block images or preload them make the count unreliable, and tracking raises privacy questions, so say in your privacy notice that you measure opens.
Verification and sending
Not related to verification; it measures what happens after delivery.