Is cold emailing businesses legal in the US?
What the federal CAN-SPAM Act requires of a cold email to another business, why it works on an opt-out basis, the penalty per message, and how to build outreach into a lead generation plan without risking it.
Yes, under federal law, as long as each message follows the CAN-SPAM Act. The Federal Trade Commission says the law makes no exception for business-to-business email, and it works on an opt-out basis: you may email someone who has not signed up, but every message must be honest about who sent it, say it is an ad, carry a postal address and offer a working way to stop future emails.
## What every cold email needs
The FTC's compliance guide sets out the main requirements:
- **Accurate header information.** The "From," "To," "Reply-To" and routing details must identify the person or business that sent it. - **An honest subject line.** It has to reflect what the message is about. - **A clear notice that it is an ad.** The disclosure has to be clear and conspicuous. - **A valid physical postal address.** Yours, in the message. - **A plain way to opt out.** The mechanism has to keep working for at least 30 days after you send. - **Opt-outs honored within 10 business days.** After that, you cannot keep emailing that address.
The guide also says you cannot contract away your legal responsibility to comply. If an agency or a lead generation firm sends email for you, its mistakes are still your problem, so ask to see a sample message before a campaign goes out.
## What breaking the rules costs
Each separate email that violates the law can draw a penalty of up to $53,088, according to the FTC guide, which notes the figure was updated in January 2024 for inflation. A sequence of a few hundred messages that all miss the postal address is a few hundred violations.
## The law is the floor of a cold email program
Following CAN-SPAM keeps you on the right side of federal law. It does nothing for whether anyone replies. Cold outreach tends to fail for reasons the statute never touches: a list of the wrong people, a message about you instead of them, and no follow-up after the first touch.
A workable plan for outbound email covers four things before the first send:
1. **Who you are writing to.** One kind of buyer with a problem you solve, named by role and company type. 2. **Why now.** A reason this month is the right time to reply, drawn from something true about their business. 3. **What happens on a yes.** A specific next step, such as a short call or a sample, and who on your side handles it the same day. 4. **The rules above, built in.** Your sending tool should add the address and opt-out link and suppress anyone who has asked to stop.
This note covers federal email law only. Calls and texts fall under separate rules, so check with a lawyer before you scale outreach across channels.
## Find the stage that is short first
Cold email is one way to fill the top of the funnel. If leads are arriving and stalling later, more email will not fix it. The six questions on this site name the stage that is costing you the most, so the plan you build is aimed at that one.