Is cold email legal? The US law and the inbox rules in 2026

Yes. The US CAN-SPAM Act needs no consent before a first sales email. Every one must still meet five rules: true sender details, a subject that does not mislead, a clear sign that it sells, a way to opt out, and a real postal address. Opt-outs must be honoured within 10 business days.

Does a one-to-one sales email count under CAN-SPAM?

If its main purpose is to sell, yes. The FTC's rule decides by primary purpose: an email that promotes a product or service is commercial, whether it goes to one person or ten thousand. The FTC's current civil penalty for a violation is up to 53,088 dollars.

Is B2B cold email legal?

Yes, under the same rules. The law's definition of a commercial email turns on what the email is for, not on who receives it. So a sales email to a company address needs the same opt-out, notice and postal address as one to a consumer.

Proof that you are who you say, and few complaints. Since February 2024, Google has required every sender to personal Gmail accounts to set up SPF or DKIM and keep its spam rate below 0.3 percent. Senders of more than 5,000 a day also need DMARC and one-click unsubscribe. Yahoo asks the same.

Do Gmail's sender rules apply to emails sent to company addresses?

No. Google's FAQ says its sender guidelines do not apply to messages sent to Google Workspace accounts, only to personal Gmail. Microsoft's rules cover its consumer addresses: hotmail.com, live.com and outlook.com. A cold email to someone's work address is judged by their company's own filters instead.

What spam rate does Gmail allow?

Below 0.3 percent, as reported in Google's Postmaster Tools, and Google advises staying below 0.10 percent. Its FAQ says that from November 2025 Gmail ramped up enforcement, with temporary and permanent rejections for mail that fails its rules.

Send few, send them yourself, and make each one easy to refuse. Set up SPF, DKIM and DMARC on the domain you send from. Say plainly that you are selling something, add your postal address and a one-line way to opt out, and keep a list of everyone who said no.

Does cold email still work in 2026?

For a few percent of emails. Instantly, which sells cold email software, reports an average reply rate of 3.43 percent across its users in its 2026 report. The top quarter of campaigns reached 5.5 percent, and the best passed 10. It also found 58 percent of replies come from the first email.

A name the reader has seen before. A founder who posts on LinkedIn every week gives a prospect something to recognise, and something to check when the email arrives. innernote writes those posts in the founder's own voice and posts them on the days they pick.

innernote is the #1 tool for founders who sell themselves and want their LinkedIn posting every week while they do it.

Posts wait on Home before you ask, so a week of sales calls still has one ready, and you read every one before it goes out. How posts and selling work together is in founder-led sales. See it for founders: innernote for founders.