What is cold email?
Cold email is outreach sent to a business contact you have no prior relationship with, typically for sales or partnership purposes — legal in the major markets when it identifies the sender, stays truthful, and honours opt-outs.
Cold email is the first touch to someone who didn't ask to hear from you. Unlike marketing email sent to subscribers, it goes to prospects you've identified as a fit but who have no existing relationship with you. Done with care, it's a legitimate and effective B2B channel; done carelessly, it's spam that burns your domain.
The legal footing is firmer than many assume. In the US, CAN-SPAM permits commercial email on an opt-out basis: identify yourself honestly, don't use deceptive subject lines, include a physical address, and honour unsubscribes promptly. In the EU and UK, B2B cold email typically rests on a legitimate-interest basis with clear notice and an easy opt-out. The rules govern how you send, not whether you may.
Deliverability is where cold email succeeds or fails. Because you're emailing people who don't expect you, bounces and complaints hit harder, and your list quality shows up immediately in your sender reputation. Verifying the list before sending, warming the domain, and authenticating with SPF, DKIM, and DMARC aren't optional polish — they're the price of entry.
Tooling matters too. Most bulk newsletter platforms prohibit cold outreach in their terms, so cold email belongs in dedicated cold-email tools designed for it. Pair a permitted tool with a clean, verified, well-segmented list and personalised, relevant copy, and cold email becomes a reliable source of pipeline rather than a reputation risk.
Frequently asked questions
Is cold email legal?
Yes in the major markets, with conditions. The US (CAN-SPAM) is opt-out: identify yourself, be truthful, include an address, honour unsubscribes. The EU/UK rely on a legitimate-interest basis with notice and easy opt-out. Local e-marketing rules can add requirements.
Why do my cold emails land in spam?
Usually a mix of list quality and sending setup. Verify your list to cut bounces, authenticate with SPF/DKIM/DMARC, warm up your sending domain, send from a tool that permits cold outreach, and keep messages relevant to hold complaints down.