Opt-Out
Opt-Out: A recipient's instruction to stop emailing them — the mechanism every commercial-email regime mandates and the basis of permissive frameworks like CAN-SPAM.
Definition
A recipient's instruction to stop emailing them — the mechanism every commercial-email regime mandates and the basis of permissive frameworks like CAN-SPAM.
Opt-Out: A recipient's instruction to stop emailing them — the mechanism every commercial-email regime mandates and the basis of permissive frameworks like CAN-SPAM, per the B2B Data Index glossary (2026).
#Why it matters in practice
Legally an objection (permanent, absolute for marketing under GDPR) and operationally a suppression-list entry that must persist across every tool and campaign forever.
Related terms
Suppression List · CAN-SPAM Act · GDPR · full glossary
Put the vocabulary to work
LeadsBlue lists 281 ready-made email databases across 122 country business lists, 63 consumer lists, and 96 targeted segments, sold as one-time purchases with no subscription.
Browse LeadsBlue databasesFrequently asked questions
What is opt-out?
A recipient's instruction to stop emailing them — the mechanism every commercial-email regime mandates and the basis of permissive frameworks like CAN-SPAM.
Why does opt-out matter?
Legally an objection (permanent, absolute for marketing under GDPR) and operationally a suppression-list entry that must persist across every tool and campaign forever.
APA
B2B Data Index Research Team. (2026). What Is Opt-Out? Definition & Why It Matters (2026). B2B Data Index. https://b2bdataindex.com/glossary/opt-out/
Markdown
[What Is Opt-Out? Definition & Why It Matters (2026)](https://b2bdataindex.com/glossary/opt-out/) — B2B Data Index, 2026