Step-by-Step Guide

How to Write a Cold Email (That Actually Gets a Reply)

Most "how to write a cold email" guides give you templates. Templates die in 2026. This guide gives you a process — one you can run on any prospect in any industry.

Step 1: Research before you write (10 minutes per prospect)

Writing a great cold email starts before you open the editor. Research first. Spend 10 focused minutes on each high-value prospect. Look for:

  • Recent company news — funding, hires, product launches, repositioning. Last 60 days max.
  • The prospect's own content — LinkedIn posts, blog posts, podcast appearances. Read their last 3-5 things.
  • What they're hiring for — open roles tell you exactly what's broken right now
  • Their actual product or service — not the pitch. Read their pricing page, watch a demo video, try the free tier.
  • Specific friction points — slow site, broken signup flow, outdated copy, missing feature competitors have

The output of research is 1-2 sentences you could not have written without doing it. That sentence is the open of your email.

Step 2: Write the subject line last, not first

Most people write the subject first and the body second. Wrong way around. The subject summarizes the body, so write the body first.

Subject line rules:

  • Lowercase first word
  • 3-5 words total
  • No questions, emojis, or all-caps
  • References something specific from the body

If your subject line could apply to any prospect in your list, it's too generic. Rewrite.

Examples that work: quick thought on Q3 hiring, re: your onboarding flow, idea for the new AE ramp.

Examples that fail: Quick question, Following up, Are you the right person?.

Step 3: Write the body in 5 lines (max 100 words)

Discipline yourself: 5 lines, 100 words. If you can't fit it, you don't understand the prospect well enough.

Line 1: Specific observation from research

Line 2: Insight or pattern from similar companies

Line 3: One-line description of how you help

Line 4: Soft CTA — ask permission, not a meeting

Line 5: First-name sign-off

Real example, exactly 100 words:

Step 4: Sign off without baggage

Your sign-off does more damage than your opener. Bad sign-offs:

  • Full title + company + phone + LinkedIn + calendar link (looks like a corporate campaign)
  • "Best regards," "Warm regards," "Cheers" + full name (formal = AI/marketing)
  • An email banner image, badge, or logo (every spam filter on Earth flags this)

Good sign-offs: just your first name. That's it. Maybe a single calendly link in your email signature, but only if you've optimized for booking calls. For the first email, less is more.

Step 5: Plan the 4-email sequence before sending email 1

Single emails are coin flips. The reply rate math:

  • Email 1 alone: 2-4% reply rate
  • 4-email sequence: 10-15% reply rate

That's a 3-5x lift from doing the same amount of research, just structured differently. The sequence pattern that works:

  • Email 1 (day 0): The pitch (5-line structure above)
  • Email 2 (day +3): A specific insight or resource — no ask. "Saw this and thought of your team."
  • Email 3 (day +7): A one-line case study from a similar company. Quantify the result.
  • Email 4 (day +12): The break-up. "Last note from me — should I close the loop, or want me to send a quick mock-up first?"

The break-up email is often the highest-replying one in the sequence. People genuinely appreciate the closure prompt.

Step 6: Test, measure, iterate (the part most people skip)

Most cold email writers send 50 emails, get 1 reply, and conclude "cold email doesn't work." Wrong conclusion. Test:

  • Subject line A/B test — same body, two subjects, 25 prospects each. The winner stays, the loser gets replaced.
  • Open vs reply gap — high opens, low replies = body is weak. Low opens, low replies = subject is weak.
  • Niche test — if reply rate is under 5% on a tight niche, the niche is wrong. Pivot before iterating on copy.

The minimum sample size to learn anything: 50 sends. Anything less is just noise.

Skip the writing. Generate the sequence.

Mail Doneky runs all 6 steps automatically — research, structure, subject, follow-ups. Free to start.

Try Mail Doneky Free →

Frequently asked questions

How long should a cold email be?
60-100 words for the initial email. Anything over 120 gets skimmed and discarded. Follow-ups can be even shorter — 30-50 words.
What time of day should I send cold emails?
9-11am or 2-4pm in the recipient's local timezone. Avoid Mondays before 10am (inbox cleanup) and Fridays after 3pm (mental checkout).
Should I include attachments in a cold email?
Almost never. Attachments trigger spam filters and look promotional. If you have something to share, link to it — and only after the prospect asks.