What Every Small Business Should Know About the CAN-SPAM Act

By Byron Clark, President of Fourth King Enterprises

What Every Small Business Should Know About the CAN-SPAM Act

When you're wearing every hat in your business: bookkeeper, marketer, service provider, it’s easy to overlook the fine print. But if you’re emailing clients, prospects, or leads, there’s one law you need to keep in mind: the CAN-SPAM Act.

This isn’t just red tape. It’s about respect. Respect for the inbox, respect for your audience, and respect for the trust you’re trying to build.

Let’s walk through what you need to include in your emails—and why it matters.

What Is the CAN-SPAM Act?

The CAN-SPAM Act is a U.S. law passed in 2003 to set rules for commercial email. If you're sending emails to promote your business—whether it’s a newsletter, a discount, or a simple hello—you’re responsible for following it.

The penalties can reach over $50,000 per email that violates the law. But don’t let that scare you. It’s easy to comply if you’re honest, transparent, and intentional with your communication.

What You MUST Include in Every Email

1. Your Real Business Name and Physical Address: At the bottom of your email, always include your full business name and a valid physical address (a P.O. Box works too). This builds credibility and keeps you compliant.

2. A Clear Way to Unsubscribe: Every email must include a simple way for someone to opt out of future emails. This can be a basic unsubscribe link. No tricks, no hoops to jump through.

3. A Subject Line That’s Honest: Your subject line must reflect what the email actually contains. No bait-and-switch. If you're offering a discount, say so. If you're sharing a new article, say that instead.

4. A Disclosure If the Message Is an Advertisement: If the primary purpose of the email is to promote your service or product, you need to make that clear. You don’t need to start with “This is an ad,” but don’t pretend it’s a personal note when it’s a promotion.

5. Respect Opt-Outs Promptly: If someone unsubscribes, you have 10 business days to remove them from your list. Don’t email them again after that unless they rejoin voluntarily.

   
   
   
   

Why This Helps Your Business, Not Just the Law

I talk with a lot of small business owners, and here's what I know: You’re not just trying to check legal boxes—you’re trying to build relationships. Following the CAN-SPAM Act is part of building trust.

When someone joins your email list, they’re inviting you into their day. Don’t abuse that. Keep your emails honest, helpful, and respectful. You’ll see better engagement, stronger brand loyalty, and fewer unsubscribes.