Cold email copywriting: how to write emails people answer

Cold email copywriting is writing short emails that a stranger reads to the end and answers. It isn't marketing copy: no headlines, no features, no persuasion tricks. The emails that get replies read like a note from one person to another, about something that matters to the reader this quarter.

The short version: under 90 words, a first line about them, their problem in their words, one sentence on what you do with one real result, and one question that takes ten seconds to answer. Then three follow-ups that each add something new.

The structure

1. First line: about them, specific and true.
2. The problem: what they're likely dealing with, as they'd say it.
3. What you do: one sentence, framed as an outcome.
4. Proof: one result for a company like theirs, with a real number.
5. The ask: one easy question.

Subject lines

Short, lower-case, plain, like an internal email: "northwind's outbound", "quick question", "idea for your site". Avoid hype, all caps and anything that reads like a promotion. The subject line's only job is to get the email opened by someone who'd care. Test a few with the subject line tester, or generate options with the subject line prompt.

The first line

The first line decides whether the rest gets read. It should be about them, and could only have been written to them:

• Weak: "I hope this email finds you well."
• Weak: "I love what you're doing at Northwind!"
• Strong: "Saw Northwind is hiring two SDRs, usually the moment outbound gets serious."

Trigger events, job posts, a recent launch or something they wrote make the best first lines. AI can draft them from public information, but check every one: a wrong detail is worse than none. See email personalization.

The problem and the offer

Name one problem in their language, then one sentence on the outcome you create. A value proposition a competitor could send word for word isn't specific enough.

Proof

One result, with a number you can stand behind, described by company type rather than name unless you have permission, for example "an SEO agency booked more than 30 meetings in under three months". Never round up and never invent.

The ask

Small asks get answered. Questions like "Is this on your list this quarter?" or "Who handles this on your side?" beat "Can we schedule a 30-minute demo?" for a first email. One call to action only.

Before and after

Before (long, and all about the sender): "Hi there, I hope you're doing well! My name is Sam and I'm the founder of Acme, a leading provider of innovative growth solutions. We offer SEO, PPC, social media, content and web design, helping businesses of all sizes achieve their goals. Our award-winning team... Would you be available for a 30-minute call this week to discuss how we can help?"

After (under 60 words, about them): "Hi Sara, saw Northwind just opened a second clinic in Austin. New locations usually take months to fill the calendar from Google alone. We help physio clinics get found locally; one went from page three to the top three for 'physio near me' in four months. Is filling the new clinic a priority this quarter?"

Both are made up to show the difference. The second is shorter, about them, has one specific result and one easy question. Grade your own drafts with the cold email grader.

Follow-ups

I send three, after 3, 5 and 7 days, each replying in the same thread and each adding something: an example, a different angle, then a polite close. Never "just bumping this". The follow-up template and the breakup email show the pattern.

Formatting

• Plain text, short paragraphs of one or two lines.
• No images, attachments or signature banners.
• One link at most, and none in the first email if you can.
• Merge tags with fallbacks, so nobody gets "Hi ,".

Mistakes to avoid

• Starting with yourself or your company.
• Listing services instead of naming one outcome.
• Fake personalisation ("Loved your recent post!") with nothing specific.
• Several questions or several links in one email.
• Hype words and fake urgency.
• Emails over 120 words.

Testing

Test ideas, not synonyms: a different opening, proof or ask. Change one thing per test, send each version to a few hundred people, and compare positive replies, not opens. The A/B test prompt helps write a clean version B.

Questions people ask

How long should a cold email be?

Under 90 words for the first email; follow-ups shorter still.

Should I use AI to write cold emails?

For drafts, research and variations, yes. For the final email, edit it until it sounds like you and every fact is checked. The cold email prompt and the 40 templates are good starting points.

mailzy's campaigns let you write a sequence with A/B versions, preview every merge tag for each lead, and have AI draft first lines you check before sending. See campaigns.