Cold email is a personalized, one-to-one business email sent to someone who has not interacted with you before, usually to start a sales, partnership, or hiring conversation. Unlike spam, a legitimate cold email is relevant to the recipient’s role, honestly identifies the sender, and makes it easy to opt out.
The difference is relevance, honesty, and consent to stop. A cold email goes to a specific person whose role makes the message relevant, comes from a real person at a real company, uses a truthful subject line, and includes a way to opt out that is honored. Spam is bulk, untargeted, often deceptive, and ignores opt-outs.
Cold email vs. email marketing
Email marketing (newsletters and promotions) goes to subscribers who opted in, usually from a broadcast platform with designed templates. Cold email goes to prospects one-to-one, typically as plain text from a person’s own mailbox, and the goal is a reply rather than a click.
Anatomy of a good cold email
A short, specific subject line. A first line that shows you know who they are. One sentence on the problem you solve for people like them. One piece of proof. One low-effort ask, such as a 15-minute call. A clear signature with your name, company, and postal address, plus an unsubscribe option.
Example
Subject: Reply handling at Northwind — Hi Jordan, I saw Northwind is hiring two SDRs in Chicago. Teams that size usually lose hours sorting replies by hand. Infiara labels replies as Meeting, Interested, or Pricing and opens a task for the rep, so nothing slips. Worth a 15-minute look next week? — Sam
How many follow-ups to send
Many replies come after the first email, so a short sequence of two or three follow-ups spaced a few days apart is common. Stop immediately when someone replies or asks to be removed.
Questions
Frequently asked questions
Is cold email illegal?
No, not in itself. Rules differ by country: the US CAN-SPAM Act allows commercial email with honest headers, a postal address, and a working opt-out, while the EU (GDPR and ePrivacy rules) and Canada (CASL) are stricter. Check the rules where your recipients are.
What is a good cold email reply rate?
Reply rates vary widely by audience, list quality, and offer. Measure your own baseline per campaign and improve targeting and the first two lines before increasing volume.
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