CAN-SPAM Act: 7 Key Requirements for Newsletters

published on 01 June 2025

Avoid hefty fines and build trust with your audience by following these 7 CAN-SPAM Act rules for newsletters:

  1. Accurate Sender Information: Use truthful "From", "To", and "Reply-To" details.
  2. Honest Subject Lines: Ensure subject lines reflect the email's content.
  3. Label Advertisements Clearly: State if the email is an ad.
  4. Include a Physical Address: Provide a valid mailing address (street, P.O. box, or private mailbox).
  5. Easy Unsubscribe Options: Offer a clear, simple way to opt out - no hidden steps.
  6. Process Opt-Outs Quickly: Remove unsubscribed users within 10 business days.
  7. Monitor Third-Party Vendors: Ensure compliance for emails sent on your behalf.

Why it matters: Violations can result in fines of up to $53,088 per email. Plus, compliance strengthens customer trust and protects your sender reputation. Use tools like Mailchimp or Substack to automate compliance tasks, including unsubscribe links and physical address inclusion.

Quick Tip: Make unsubscribing painless and process requests immediately to avoid spam complaints and penalties.

Complying with the CAN SPAM Act - Business Tips | Federal Trade Commission

Federal Trade Commission

1. Use Accurate Sender Information

The CAN-SPAM Act starts with a simple but critical rule: your sender information must be accurate and truthful. This means every detail in your email, from the sender's name to the routing data, must clearly identify who is sending the message.

As the FTC explains, "Your 'From,' 'To,' 'Reply-To,' and routing information – including the originating domain name and email address – must be accurate and identify the person or business who initiated the message". This requirement extends to all the technical data email servers rely on to process and deliver your message.

What Sender Information Includes

Several key components fall under the umbrella of sender information, and all must be correct:

  • Email address: The actual address used to send the email.
  • Domain name: The domain linked to the sending email address.
  • Sender name: This could be your personal name, business name, or brand.
  • Reply-To address: The address subscribers use to respond, if different from the sending address.
  • Routing information: The technical details showing the email’s path to the recipient.

If any of these elements are false or misleading, it’s a direct violation of the CAN-SPAM Act. And the penalties? They’re steep.

The Consequences of Non-Compliance

Getting this wrong can cost you - literally. Violations can lead to penalties of up to $53,088 per email. What’s more, responsibility doesn’t just fall on the sender. Both the company promoting its product in the email and the entity that sent the message can be held accountable.

Steps to Stay Compliant

To avoid these costly mistakes, ensure your email address clearly represents your business. Using generic email addresses that obscure your identity can confuse recipients and raise red flags. The sender information should leave no doubt about who is behind the email.

Your Reply-To address also matters. If someone replies to your email, they should reach a real person or team ready to respond. While the CAN-SPAM Act doesn’t ban no-reply addresses, they’re not ideal for fostering trust or building relationships with your audience.

Finally, make sure your routing information and domain authentication are set up correctly. Most professional email platforms handle these technical details for you, ensuring everything aligns with compliance standards.

2. Write Honest Subject Lines

The subject line of your newsletter is your first chance to make an impression - so make it count by being truthful. It should clearly reflect the content of your email without misleading your audience. This isn't just about maintaining trust; it's also about staying on the right side of federal law, which imposes serious financial penalties for deceptive practices.

The rule is simple: your subject line must align with what's inside the email. For instance, if your subject line mentions "urgent account information", the email should genuinely include account details - not a hidden sales pitch.

Real-World Consequences of Misleading Subject Lines

Plenty of companies have paid a steep price for getting this wrong. Jumpstart Technologies, for example, was fined $900,000 for using misleading subject lines and disguising promotional emails as personal messages. Similarly, Experian Consumer Services faced a $650,000 fine for claiming their emails contained critical account information when they were actually promoting products.

These cases serve as a stark reminder: deceptive subject lines can cost businesses dearly, with penalties reaching up to $53,088 per email.

Common Traps to Avoid

Certain tactics are clear violations of CAN-SPAM rules. Here are a few to steer clear of:

  • False urgency: Avoid phrases like "URGENT: Your account will be closed" unless there's a legitimate reason for the urgency.
  • Fake familiarity: Don't use subject lines like "Following up on our conversation" unless a prior discussion actually occurred.
  • Bait-and-switch: If your subject line promises a free resource, like a guide to email marketing, make sure the email delivers on that promise rather than redirecting to a sales pitch.

Why Honest Subject Lines Matter

Honest subject lines aren't just about compliance - they're about building trust. When your subject line accurately reflects your email's content, it sets clear expectations for your audience. Whether you're sharing industry tips or announcing a sale, be upfront about it.

"Honest subject lines build clarity and set accurate expectations for recipients, fostering trust." - Shawn Griffin, Digital Marketing, Americaneagle.com

This transparency pays off. When recipients know what to expect, they're more likely to engage with your emails and less likely to flag them as spam. By focusing on honesty in your subject lines, you're not just avoiding penalties - you’re laying the foundation for a trustworthy and effective email strategy.

3. Label Advertisements Clearly

If your newsletter includes promotional content, the CAN-SPAM Act mandates that you clearly identify the message as an advertisement. This isn’t optional - it’s about making your intentions immediately obvious. The rule applies to any email that’s primarily commercial. Let’s break down how to label your advertisements the right way.

How to Label Your Advertisements Properly

Use plain, straightforward language to identify promotional content. For instance, including words like "advertisement" or "solicitation" in your email makes it clear that the message is promotional. Other simple phrases, such as "This is a great offer for you" or "You might find this product interesting," can also signal that the email contains a sales pitch. The key is to leave no room for ambiguity - your audience should immediately understand the email’s commercial nature.

Why Clear Labeling Builds Trust

Transparency isn’t just about compliance - it’s also about earning your audience's trust. When subscribers know what to expect, they’re more likely to view your content positively. Consider this: 59% of U.S. consumers report being misled by false advertising, and only 4% believe advertisers act with integrity. On top of that, 71% of consumers say trust in a brand has become a critical factor in their purchasing decisions. By clearly marking promotional emails, you demonstrate honesty, positioning yourself as a brand people can rely on. Just like having accurate sender information and clear subject lines, transparent labeling strengthens your relationship with your audience.

The Cost of Getting It Wrong

Failing to label advertisements properly can hit your wallet hard. Violating the CAN-SPAM Act could lead to penalties of up to $53,088 per email. And the consequences don’t stop there - your reputation could take a serious hit, and rebuilding customer trust isn’t easy.

For example, Red Bull faced a multimillion-dollar settlement due to deceptive advertising practices. It’s a stark reminder that unclear labeling can cost far more than just fines - it can damage the credibility of your entire brand.

4. Include Your Physical Address

Transparency isn’t just a nice-to-have - it’s a must when it comes to email newsletters. One key step in staying transparent? Including a valid physical postal address. This isn’t just a suggestion; it’s a legal requirement under the CAN-SPAM Act, designed to build trust and credibility with your subscribers.

What Qualifies as a Valid Address?

The Federal Trade Commission lays out the rules clearly:

"Your message must include your valid physical postal address. This can be your current street address, a post office box you've registered with the U.S. Postal Service, or a private mailbox you've registered with a commercial mail receiving agency established under Postal Service regulations."

In short, you’ve got three options:

  • Your current street address
  • A P.O. box registered with the USPS
  • A private mailbox from a commercial mail receiving agency (as long as it’s registered under Postal Service regulations)

Whichever option you choose, make sure it’s properly registered and up to date.

P.O. Boxes: A Smart Option for Home-Based Businesses

If you run your business from home and don’t want to share your residential address, a P.O. box is a practical solution. The USPS offers this service for as little as $4.67 per month.

Another option is a private mailbox through a commercial mail receiving agency. Just ensure the agency complies with Postal Service regulations and that your registration is current.

Why It’s More Than Just a Rule

Adding your physical address isn’t just about checking a legal box - it’s about showing your audience that you’re a real, trustworthy business. A physical address reassures subscribers that they’re dealing with a legitimate operation.

The Risks of Getting It Wrong

Using an invalid or fake address isn’t just risky - it’s expensive. Violations of the CAN-SPAM Act can cost up to $53,088 per email. And don’t even think about using someone else’s address without permission or making one up; the consequences simply aren’t worth it.

Your physical address is more than a legal necessity - it’s a trust signal. By including a valid, registered address, you’re reinforcing the transparency and credibility your subscribers expect. It’s a small but essential step in building a trustworthy newsletter and staying compliant with federal regulations. Up next: how to make unsubscribing just as easy and transparent.

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5. Provide Easy Unsubscribe Options

Making it simple for users to unsubscribe isn't just a courtesy - it's a legal requirement. The CAN-SPAM Act mandates that every commercial email must have a clear and visible way for recipients to opt out of future messages.

What Does an "Easy" Unsubscribe Look Like?

The Federal Trade Commission (FTC) emphasizes that unsubscribe options need to be straightforward. This means no tiny fonts, no confusing instructions, and no buried links. The process should be intuitive enough for any user to find and understand.

There are two main ways to let users unsubscribe: either provide a return email address or offer a simple, web-based method. Most businesses go with the latter, typically including an unsubscribe link that directs users to a single webpage. Let’s break down the key requirements for this process.

The One-Click Rule

Unsubscribing should never feel like a chore. The FTC sets clear guidelines:

"You can't charge a fee, require the recipient to give you any personally identifying information beyond an e-mail address, or make the recipient take any step other than sending a reply e-mail or visiting a single page on an Internet website as a condition for honoring an opt-out request."

This means no forcing users to log in, no additional personal details like phone numbers, and absolutely no fees. The process must be as simple as replying to an email or clicking a single link. Plus, that link needs to stay active for at least 30 days to meet compliance standards. Starting February 2024, major email providers like Google and Yahoo will require bulk senders to include a one-click unsubscribe option.

Why Easy Unsubscribes Are Good for Business

Making it easy to unsubscribe isn’t just about following the rules - it’s also a smart strategy. Alexandre Zibrik, Compliance and Deliverability Engineer at Sinch Mailjet, puts it this way:

"Allowing your recipients to easily unsubscribe is not only good manners, it's also a good deliverability practice to follow. It will help reduce your overall spam rates, improve your reputation, and ensure that you're sending emails to an active audience going forwards, which will strengthen your inbox rate. Deliverability is all about aligning yourself with your recipients' expectations, and allowing them to unsubscribe is a proven method to align with subscriber expectations."

When unsubscribing is difficult, frustrated users are more likely to mark your emails as spam, which can harm your sender reputation. On the flip side, a smooth opt-out process keeps your audience engaged and your emails out of spam folders.

Best Practices for Unsubscribe Design

To ensure users can easily find the unsubscribe option, place the link where they expect it - usually in the email footer. Some businesses also include it at the top of the email, near the sender's address. Use clear, direct language like "Update Email Preferences" instead of vague phrases.

Before users completely unsubscribe, consider offering alternatives. For example, you can let them choose to receive fewer emails or adjust their preferences. However, always provide a straightforward option to unsubscribe from all communications.

The Risks of Non-Compliance

Failing to meet these requirements can be costly. With the FTC leveraging advanced tools like artificial intelligence to detect violations at scale, staying compliant is crucial - not just to avoid fines but also to maintain your audience's trust and protect your business's reputation.

6. Process Opt-Outs Within 10 Business Days

When someone clicks the unsubscribe link in your email, you’re legally required to remove them from your mailing list within 10 business days. This timeline excludes weekends and federal holidays. The Federal Trade Commission (FTC) emphasizes this clearly: "You must honor unsubscribe requests within 10 days". Ignoring this rule can lead to penalties as high as $53,088 per email.

Why Acting Quickly Is Important

Although the law gives you up to 10 business days, handling opt-outs faster - ideally within 24 hours - can improve user satisfaction and minimize spam complaints. Delays in processing unsubscribe requests may frustrate recipients, prompting them to mark your emails as spam. This can hurt your sender reputation and impact how well your emails get delivered.

Automating Opt-Out Processing

Using automation to manage opt-outs ensures that unsubscribed addresses are immediately added to your "Do Not Contact" list. This approach reduces the risk of human error and prevents these contacts from being accidentally included in future campaigns. Once automated, make sure to document every request to stay compliant.

Keep Detailed Records

It’s crucial to maintain a record of each opt-out request, including the email address and confirmation of removal. This documentation serves as proof of compliance. The FTC has clarified that opt-out requests remain valid indefinitely:

"The FTC has decided not to alter the time limit (10 business days) for honoring an opt-out request; in addition, it reaffirms that there is no time-out on an opt-out request, i.e. that it may only be over-ridden by a subsequent explicit opt-in request."

Be sure to log the date and time of each request, along with confirmation that the email address was removed from all applicable lists.

Managing Opt-Outs Across Multiple Channels

Opt-out requests can come through various channels - not just your website. Whether a subscriber replies to your email, calls customer service, or reaches out via social media, all requests must be processed within the same 10-business-day window. Train your team to recognize these requests and follow clear procedures to ensure they’re handled promptly.

The Risks of Ignoring Compliance

Failing to process opt-outs on time can lead to hefty fines. For instance, if you mistakenly send emails to 1,000 people who’ve unsubscribed, the fines could exceed $53 million. Beyond the financial impact, non-compliance can damage your reputation and cause major email providers to block your messages.

Managing opt-outs efficiently isn’t just about avoiding penalties - it’s about building trust. By prioritizing compliance, you enhance your deliverability and set a strong foundation for responsible email practices.

7. Monitor Third-Party Vendors

Managing your email list properly is just one piece of the puzzle. Equally important is keeping a close watch on your third-party vendors. Hiring an email service provider doesn't mean you can hand off your responsibility for CAN-SPAM compliance. Both your business and the vendor sending the emails can be held legally accountable for violations, which can lead to hefty fines.

In short, if your vendor slips up, your business could face serious financial and legal risks.

Vetting Vendors Before You Partner

Before signing on with any third-party email service, make sure to do your homework. Ask potential vendors about their CAN-SPAM compliance practices. Specifically, find out how they handle opt-out requests, manage suppression lists, and ensure sender information is accurate. Request proof of their compliance processes and include clauses in your contract that require them to stick to these standards.

Keep a Close Eye on Your Vendors

Once you've partnered with a vendor, the work doesn’t stop there. Regularly review email templates and campaigns to ensure they meet all CAN-SPAM requirements. This means checking that subject lines are truthful, sender details are correct, and unsubscribe links are clear and easy to use.

Keep an eye on key metrics like spam complaint rates. High complaint rates can hurt your sender reputation with email providers and may indicate compliance issues. Monitoring these numbers can also help you spot problems early and take action before they escalate.

Centralize Suppression Lists for Better Control

Managing opt-outs across multiple vendors can get tricky. To avoid mistakes, maintain a master suppression list. If someone unsubscribes from one vendor’s email, their email address should be blocked across all your campaigns, no matter which vendor is sending them. This centralized system ensures you respect opt-out requests and avoid the costly error of contacting someone who has already unsubscribed.

Conduct Regular Audits

Don’t assume compliance - verify it. Conduct regular audits of your vendors’ practices. Check how they handle unsubscribe requests, confirm that opt-outs are processed within the required 10 business days, and ensure accurate records are kept. These audits help you confirm that vendors are living up to the commitments outlined in your contracts and can catch potential problems before they turn into major violations.

The legal environment is shifting, with greater scrutiny on affiliate and partner networks. Regulators are cracking down on businesses that claim ignorance of non-compliant emails sent on their behalf. Even if your vendor is at fault, your brand could still face penalties and reputational damage.

Taking a proactive approach to vendor management is essential. By enforcing strict oversight and setting clear contractual expectations, you can reduce the chances of costly CAN-SPAM violations while still leveraging the expertise of third-party email marketers.

How Newsletter Platforms Help with CAN-SPAM Compliance

Let’s face it - managing CAN-SPAM compliance manually is a hassle. Thankfully, newsletter platforms take the heavy lifting off your shoulders by automating many of these tasks. These tools ensure you stay compliant while letting you focus on what really matters: creating engaging content.

One of the standout features these platforms offer is automated unsubscribe links. Services like Beehiiv, Mailchimp, and Substack make this process seamless by automatically including compliant unsubscribe links in every email. These links are designed to be visible and easy to use, connecting directly to the platform's opt-out system. This way, you don’t have to worry about forgetting to add them or ensuring they work correctly.

Another key compliance feature is automatic inclusion of your physical address, a requirement under CAN-SPAM. Platforms like Mailchimp let you set your address once in your account settings, and it’s automatically added to the footer of all your emails. This ensures you meet this legal requirement without any extra effort.

Some platforms also include subject line testing tools, which analyze your email subject lines for misleading or non-compliant language. These tools help you avoid common pitfalls and ensure your emails meet compliance standards before they even go out.

When it comes to opt-outs, these platforms shine. They automatically process unsubscribe requests and remove users from your mailing list immediately, meeting the 10-business-day rule effortlessly. For example, when someone clicks an unsubscribe link, the system removes them right away and even sends a confirmation email, so you don’t have to lift a finger.

Advanced platforms go a step further by maintaining a centralized suppression list. This ensures that if someone unsubscribes from one of your newsletters, they won’t accidentally receive emails from any of your other campaigns. It’s a smart way to avoid compliance issues and keep your audience happy.

When choosing a newsletter platform, prioritize features like automatic unsubscribe links, physical address management, subject line analysis, clear advertisement labeling, and robust opt-out systems. Detailed reporting on unsubscribe rates and spam complaints is also helpful for tracking your sender reputation and staying on top of compliance.

For a deeper dive, check out Newsletter Platform Comparison (https://bestnewsletterplatforms.com). This resource breaks down how platforms like Beehiiv, Substack, Mailchimp, and AWeber handle CAN-SPAM requirements, helping you pick the right tool for your needs.

The best platforms handle compliance in the background so you can focus on crafting great content. Take the time to evaluate your options and choose a platform that keeps you legally protected while making compliance as simple as possible.

Conclusion

Sticking to the CAN-SPAM Act isn’t just about dodging fines - it’s about earning your subscribers’ trust and protecting your brand’s reputation. A stark reminder of the stakes came in 2006, when Christopher William Smith was hit with a $5.3 million penalty for violating CAN-SPAM rules in his email practices.

Beyond the financial risks, following these guidelines shows you respect your audience’s preferences, laying the groundwork for lasting relationships with your subscribers. Fortunately, modern newsletter platforms make compliance easier by automating many of the requirements, like including unsubscribe links and displaying your physical address. These tools simplify the process, but compliance requires ongoing effort. As regulations evolve, staying informed and proactive is key.

To stay on track, regular audits of your email practices, keeping your contact lists updated, and staying current on changes to email laws are critical. Email regulations often reflect shifting concerns about privacy and communication, so adapting to these changes not only keeps you compliant but also reassures your subscribers that their trust is well-placed.

"Remember, email compliance is an ongoing process that requires staying up-to-date with evolving regulations and continuously monitoring and optimizing your email marketing strategies to align with best practices." - debutify.com

Ultimately, compliance is more than just a legal box to check - it’s the foundation for trust and effective communication. Choose tools that prioritize compliance, maintain clear and honest communication with your audience, and treat CAN-SPAM requirements as the starting point for best practices. Your subscribers - and your business - will be better for it.

FAQs

What happens if a business violates the CAN-SPAM Act?

Failing to meet the standards set by the CAN-SPAM Act can have serious repercussions for businesses. The Federal Trade Commission (FTC) can issue fines of up to $53,088 per violation, and if multiple infractions occur, those fines can escalate quickly. But the consequences don't stop at financial penalties - businesses could also face legal action, criminal charges, and significant harm to their reputation.

On top of fines, non-compliance often brings extra expenses, like legal fees or settlement costs. Following the CAN-SPAM Act isn’t just about avoiding penalties; it’s also about safeguarding your business's credibility and maintaining the trust of your audience.

How do newsletter platforms help businesses comply with the CAN-SPAM Act?

Newsletter platforms take much of the headache out of CAN-SPAM compliance by automating essential tasks and minimizing the chance of mistakes. For instance, they come with built-in opt-out features, making it simple for recipients to unsubscribe and ensuring businesses adhere to legal standards. These tools also keep subscriber lists up-to-date, automatically removing anyone who has opted out, so you don’t have to worry about accidentally emailing them.

On top of that, these platforms ensure sender details and subject lines are clear and accurate, helping to avoid any misleading content while fostering trust with your audience. By streamlining these processes, businesses can save time, remain compliant, and dedicate more energy to crafting content that truly resonates with their readers.

Why should businesses monitor their email vendors for CAN-SPAM compliance, and how can they do it effectively?

It's crucial for businesses to keep a close eye on their email vendors to ensure CAN-SPAM compliance. Why? Because if a vendor violates the law - whether through deceptive practices or by failing to meet legal requirements - the business itself can be held accountable and face penalties.

To avoid this, businesses should take a few proactive steps. Regularly auditing vendors, monitoring complaint rates, and maintaining open communication about compliance expectations are all smart moves. Additionally, make sure vendors include clear opt-out options and provide accurate sender information, as these are non-negotiable under the CAN-SPAM Act. Taking these precautions not only shields your business from potential legal trouble but also supports ethical and trustworthy marketing efforts.

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