The CAN-SPAM Act is a United States law that sets legal requirements for commercial email, including accurate sender information, a clear way to unsubscribe, and honest subject lines.
A Law Often Misunderstood as Stricter Than It Is
What is the CAN-SPAM Act commonly assumed to require, incorrectly, is upfront permission before sending marketing email in the first place. It doesn’t. Unlike GDPR or CASL, CAN-SPAM allows a business to email someone who never opted in, as long as the message is honest and gives that person an easy way to opt out afterward. This surprises a lot of US-based store owners who assume they’re automatically breaking the law by emailing a purchased list or a contact who never explicitly subscribed, when the actual violation risk lies elsewhere: in deceptive subject lines, hidden sender identity, or a broken unsubscribe process.
What the Law Actually Requires
- Accurate sender information, including a real physical mailing address, not a P.O. box used to obscure identity.
- A subject line that isn’t misleading about what the email actually contains.
- A working unsubscribe link, honored within 10 business days of the request, not just displayed for appearance.
- Clear identification as an advertisement when the message is promotional in nature.
These four items make up the core CAN-SPAM requirements, and none of them involve obtaining consent before the first send, which is the part most people assume incorrectly.
Where the Real Risk Sits
CAN-SPAM compliance failures rarely come from sending to an unpermissioned list, they come from the mechanics being wrong: an unsubscribe link that’s broken or takes weeks to process, a subject line promising something the email doesn’t deliver, or sender information that’s deliberately vague. CAN-SPAM Act email marketing penalties are assessed per individual email, not per campaign, which means a technical failure affecting thousands of sends can compound into a genuinely serious liability quickly, even though each individual violation might look minor in isolation.
Who Actually Gets Held Responsible
A detail that surprises a lot of store owners: liability under CAN-SPAM doesn’t stop at whoever hit send. Both the business whose product is being advertised and any third party actually sending the email on their behalf can be held responsible if the message violates the law. Using an email platform doesn’t automatically transfer legal responsibility away from the store, which is why relying on a platform that builds compliant defaults, correct unsubscribe handling, accurate sender fields, into every send matters more than treating those requirements as something to configure once and forget.
Enforcement in practice tends to focus on repeat, obvious violators rather than a single isolated mistake, but that’s a reason to fix a broken unsubscribe process quickly once discovered, not a reason to leave it broken because enforcement feels unlikely.
Related terms:
Adflipr includes unsubscribe links and sender verification by default in every campaign, supporting core CAN-SPAM compliance requirements out of the box.
