Glossary

Preheader

The short line of text that shows after the subject in the inbox list.

ValidReach Team · Updated 2026-10-26

In practice

It acts as a second subject line. Write it deliberately, since otherwise clients show the first words of the body, often “View in browser”. How much is shown varies by client, from a few dozen characters to over a hundred. Preview text is the same thing under another name.

Verification and sending

Not related to verification; it only affects how a delivered message looks in the inbox.