Opt-In
Opt-In: Explicit consent from a recipient to receive email — single (one action) or double (confirmed via a verification click).
Definition
Explicit consent from a recipient to receive email — single (one action) or double (confirmed via a verification click).
Opt-In: Explicit consent from a recipient to receive email — single (one action) or double (confirmed via a verification click), per the B2B Data Index glossary (2026).
#Why it matters in practice
The consent gold standard, legally strongest everywhere and the performance ceiling in benchmarks. Cold outreach operates below it under role-relevance regimes.
Related terms
Opt-Out · Suppression List · CAN-SPAM Act · full glossary
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What is opt-in?
Explicit consent from a recipient to receive email — single (one action) or double (confirmed via a verification click).
Why does opt-in matter?
The consent gold standard, legally strongest everywhere and the performance ceiling in benchmarks. Cold outreach operates below it under role-relevance regimes.
APA
B2B Data Index Research Team. (2026). What Is Opt-In? Definition & Why It Matters (2026). B2B Data Index. https://b2bdataindex.com/glossary/opt-in/
Markdown
[What Is Opt-In? Definition & Why It Matters (2026)](https://b2bdataindex.com/glossary/opt-in/) — B2B Data Index, 2026