Glossary

Opt-in

A person’s active agreement to receive your email.

ValidReach Team · Updated 2026-10-26

In practice

Single opt-in adds them as soon as they submit the form. Double opt-in asks them to confirm by email first. Keep a record of when, where and what they agreed to.

Verification and sending

Opt-in proves permission, and verification proves the address works. A good list has both.