CAN-SPAM Act
CAN-SPAM Act: The US federal law governing commercial email: opt-out based, requiring accurate headers, honest subjects, a postal address, and 10-day opt-out honoring.
Definition
The US federal law governing commercial email: opt-out based, requiring accurate headers, honest subjects, a postal address, and 10-day opt-out honoring.
CAN-SPAM Act: The US federal law governing commercial email: opt-out based, requiring accurate headers, honest subjects, a postal address, and 10-day opt-out honoring, per the B2B Data Index glossary (2026).
#Why it matters in practice
The world's most permissive major regime — no prior-consent requirement — which shifts all US campaign risk onto data quality and deliverability.
Related terms
GDPR · CASL · Legitimate Interest · full glossary
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What is can-spam act?
The US federal law governing commercial email: opt-out based, requiring accurate headers, honest subjects, a postal address, and 10-day opt-out honoring.
Why does can-spam act matter?
The world's most permissive major regime — no prior-consent requirement — which shifts all US campaign risk onto data quality and deliverability.
APA
B2B Data Index Research Team. (2026). What Is CAN-SPAM Act? Definition & Why It Matters (2026). B2B Data Index. https://b2bdataindex.com/glossary/can-spam/
Markdown
[What Is CAN-SPAM Act? Definition & Why It Matters (2026)](https://b2bdataindex.com/glossary/can-spam/) — B2B Data Index, 2026