Email marketing in the United States, from the law to your first campaign

This guide covers the law, the list, the campaign and the inbox, in the order you'll actually need them. Skim the chapter list below, jump to what's relevant, or read straight through before you send your first message.

Commercial email in the United States is governed by the CAN-SPAM Act, enforced by the Federal Trade Commission. It applies to any email whose primary purpose is advertising or promoting a product or service, sent to a US recipient, regardless of your company's size or whether the recipient is a business or a consumer. There's no exemption for small businesses and no exemption for B2B.

The law is shorter and more practical than most people expect. Every commercial email has to:
- Use accurate, non-deceptive header information: the From, To and routing information must identify who actually sent it
- Use a subject line that reflects the content of the message, not a misleading hook
- Identify the message as an advertisement where that applies, and most promotional email qualifies
- Include your business's valid physical postal address
- Include a clear, working way to opt out of future email
- Honor every opt-out request within 10 business days, with no fee, no login requirement and no added step

That's the baseline. It does not require opt-in consent before you send a first commercial email, which surprises people used to other countries' rules. You can email someone who hasn't asked to hear from you, provided the message is honest, identifies you accurately and gives them an easy way out. Permission still matters for results, a list that asked to hear from you opens and clicks at a different level than one that didn't, but it isn't the legal bar.

Violations carry real financial penalties, assessed per email, and the FTC can pursue both the business whose product is being advertised and anyone hired to send on its behalf. Ignoring opt-outs, forging header information or renting a scraped list to someone who then spams it are the patterns that draw enforcement.

This section is general information, not legal advice. If your sending touches sensitive categories, like health or finance, or you're unsure how a specific campaign holds up, talk to an attorney who knows email law. For everything else: tell the truth about who you are, make opting out effortless, and honor it fast.

Not every message belongs in the same slot. A welcome email competes for attention differently than a Tuesday newsletter, and a cold first touch has to work harder than a reply to someone who already clicked. Match the type to the moment and the list stays engaged instead of fatigued.

Here's the working set, and when each one earns its place in the calendar.

Delivered, bounced, complained, unsubscribed: those four numbers tell you if your sending is healthy before you look at a single open or click. A high bounce rate means your list needs cleaning. A rising complaint rate means your targeting or frequency is off. Both get worse the longer you ignore them, because inbox providers remember.

Opens are the number everyone looks at first and the one most likely to mislead you. Apple's Mail Privacy Protection and similar features pre-load images on a device automatically, which registers as an open whether or not a person ever saw the message. Treat every open the same way and your numbers go up while your results stay flat.

Separate human opens from automated ones and you get a number you can act on. Clicks are harder to fake automatically and tell you more about genuine interest. Track them by link and you'll see exactly which offer, subject line or send time actually moved people, not just which one got technically delivered.

Yeti Outreach reports delivered, human opens, automated opens, clicks, bounces, complaints and unsubscribes separately, live from the first message you send. Read the human column, not the blended one, and you're comparing campaigns on what actually happened.