CAN-SPAM for real estate B2B outreach: a plain-English guide
April 22, 2026 · 6 min read
CAN-SPAM is the US federal law that governs commercial email. It is not especially strict compared to GDPR or CASL, but violations carry civil penalties of up to $53,088 per email as of 2026. If you're sending cold email to NYC real estate agents, you need to follow it. The good news: compliance is five concrete things, and most of them are easy.
This post is a plain-English summary. It is not legal advice — if you run a large sending operation, talk to a lawyer.
Does CAN-SPAM apply to your real estate emails?
CAN-SPAM applies to any email whose primary purpose is commercial — promoting a product or service. It does apply to B2B email. It applies even when you're writing to another business, not a consumer. Two exceptions:
- Transactional messages (confirmations of an order, shipping updates, account notices) are exempt.
- Relationship messages (a real response to something the recipient asked you) are exempt.
Cold outbound to brokers is almost always subject to CAN-SPAM. Plan for it.
The five requirements
| Rule | What it means in practice |
|---|---|
| 1. Do not use false or misleading header info | The From, To, Reply-To, and routing info must accurately identify who sent the email. No spoofing. |
| 2. Do not use deceptive subject lines | The subject has to relate to the body. "Re: your listing" when there was no prior thread is not allowed. |
| 3. Identify the message as an ad | You can do this softly ("marketing message from BrokerList") — it does not need a flashing banner. But it has to be clear. |
| 4. Include your valid physical mailing address | A real address in the footer. Can be your office, a PO box, or a private mailbox registered with the USPS. |
| 5. Honor opt-outs within 10 business days | Give a working unsubscribe link or reply-based opt-out. Remove the address from all future sends within 10 business days (we do it within 24 hours). |
The List-Unsubscribe header
Gmail, Yahoo, and Apple Mail all prefer emails that carry a List-Unsubscribe header. It's not explicitly required by CAN-SPAM, but it's a best practice and it measurably improves deliverability. Two forms:
List-Unsubscribe: <mailto:unsubscribe@yourdomain.com>List-Unsubscribe: <https://yourdomain.com/u/abc123>
Add List-Unsubscribe-Post: List-Unsubscribe=One-Click as well — it lets Gmail one-click unsubscribe the user without them even clicking your footer link. Counterintuitive, but it actually helps sender reputation.
What we do on our side
Every address that ships with BrokerList.ai includes our own List-Unsubscribe and removal handling at /brokers/remove. If an agent opts out from a customer send that came from BrokerList data, they flow back into our suppression list — we don't re-ship that address to any other customer. This keeps the underlying list clean and keeps customers from unknowingly mailing someone who's already opted out. For deliverability hygiene beyond compliance see how to email NYC real estate agents without landing in spam.
A minimum-compliance email footer
You are receiving this because you are a licensed real estate
agent in New York City, and we think our product is relevant to
your book of business. If you'd rather not hear from us, unsubscribe:
https://yourdomain.com/u/{id}
BrokerList Inc., 228 Park Ave S #12345, New York NY 10003That single footer covers rules 3, 4, and 5. Combine it with a truthful From line and subject and you are fully CAN-SPAM compliant.
State-level rules
New York doesn't have a stricter email law that pre-empts CAN-SPAM, but California's CCPA adds data-handling obligations if you store Californians' email addresses. If you sell data nationally, treat California addresses carefully. Canada's CASL and the EU's GDPR both require explicit opt-in — don't cold-email into those jurisdictions without consent.
Every address we ship has a known opt-out path, an SMTP-verified domain, and flows back into suppression when a recipient unsubscribes. Grab a free preview at /sample.
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