Letter Moth

How to Write a Cold Email That Gets Replies: A Practical Guide

· 4 min read · By the Letter Moth team

To write a cold email that gets replies, keep it short, make it about the recipient's situation, and ask for one small, easy next step. A clear subject line, one line of relevance and a single question beat a long pitch almost every time.

Cold email has a bad reputation because most of it is generic. The good news is that a short, researched message stands out against that background. This guide walks through subject lines, a four-part structure, three examples (sales, job search and networking) and how to follow up.

No format guarantees a reply, and results vary with audience and timing. Also check the rules that apply to you, since commercial email laws differ by country.

What makes a cold email get a reply?

Three things matter most: relevance, brevity and a low-effort ask. Relevance tells the reader you wrote to them for a reason. Brevity respects their time. A low-effort ask, such as a yes/no question, makes replying easy.

Emails that fail usually do the opposite: they open with a company history, list features and end with "let me know if you want a call this week". Nothing in them shows research, and the ask is big.

One quick test: delete your first sentence. If the email reads better without it, it was filler.

How do I write a good cold email subject line?

A good subject line is short, specific and honest. Aim for something a colleague might plausibly send. Avoid all caps, fake "Re:" prefixes and clickbait, since they hurt trust.

Patterns that tend to work:

  • A specific reference: "Your post on onboarding emails".
  • A mutual connection: "Priya suggested I reach out".
  • A plain topic: "Question about your Q4 hiring".
  • A short ask: "15 minutes on pricing research?"

What is a simple cold email structure?

Use four short parts, in this order. Most emails fit in 60 to 120 words.

  • Opener: one line proving you wrote to them specifically.
  • Why you: one or two lines on who you are and why it is relevant to them.
  • Value or reason: what is in it for them, or the specific reason for your question.
  • Ask: one clear, low-effort question.

What are cold email examples I can adapt?

A sales-style email:

"Subject: Question about your onboarding emails Hi Nina, I read your post on reducing time-to-first-value. I work with SaaS teams on onboarding sequences and noticed your trial emails go out only on day one and day seven. Would it be useful if I sent a two-line idea for the gap in between? If not, no problem."

A job-search email to a hiring manager:

"Subject: Data analyst interested in your logistics team Hi Daniel, I have spent four years building dashboards for supply-chain teams and saw your group is hiring an analyst. I built a delivery-time forecast that cut late shipments in our region, and I would like to share the short write-up. Would you be open to me sending it over?"

A networking email:

"Subject: Your talk at the Product Meetup Hi Tom, your point about testing pricing before building features stuck with me. I am a product manager in fintech moving towards pricing work. Could I ask one question about how you picked your first experiment? Happy to keep it to a couple of lines."

How do I personalize a cold email without spending an hour?

You need one real detail, not a paragraph of flattery. Look for something recent and specific: a post, a launch, a hire, a talk, a job posting. Then connect it to the reason you are writing in one sentence.

Avoid fake personalization such as "I love what your company is doing". It tells the reader nothing and screams template.

If the person has a LinkedIn profile, spend two minutes on their recent activity. Our LinkedIn connection guide shows how to pick that one detail.

How do I follow up on a cold email?

Most replies to cold email arrive after a nudge, not the first message, so plan one or two polite follow-ups. A typical rhythm is three to five business days after the first email, then a week after that.

Make each follow-up add something: a short new fact, a clarified question, or an easier ask. "Just bumping this" adds nothing.

"Hi Nina, adding one thought: your day-four email could simply reuse the setup tip from your help centre. If this is not a priority right now, no worries at all."

Stop after two or three. If you want detailed timing, read how to follow up when nobody replies.

What mistakes should I avoid in cold emails?

Check your draft for these before hitting send.

  • Opening with yourself or your company instead of the reader.
  • Writing more than about 120 words.
  • Asking for a call without giving a reason to take one.
  • Using attachments or heavy formatting in the first email.
  • Sending the same text to hundreds of people.
  • Ignoring unsubscribe or opt-out obligations where they apply.

How can I write cold emails faster?

The slowest part is gathering context and wording it naturally. Keep a file of your own best emails and swap the personal detail each time.

Letter Moth can draft a cold email from the page you have open, such as a LinkedIn profile or a company page, using your saved profile and a tone you choose. It inserts into the Gmail compose box and does not send, so you review and click send yourself. It does not find email addresses or run sequences. The cold email writer page has details.

If you want a faster way through these steps, you can try Letter Moth. Always edit the draft so it sounds like you and fact-check every line.

Try Letter Moth free

Drafts a LinkedIn note, cold email or application answer from the page you are on. You edit it and press send. 10 drafts a day are free, no card needed.

Add to Chrome, it's freeSee the install steps

Frequently asked questions

How long should a cold email be?

Roughly 60 to 120 words is a good target. Short enough to read on a phone, long enough to include one relevant detail and one question.

What is the best time to send a cold email?

There is no universal answer. Many people test weekday mornings in the recipient's time zone, but your audience may differ, so test and watch your own results.

How many follow-ups should I send?

One to three polite follow-ups is common. Each should add something new, and you should stop if the person declines or asks you to.

Are cold emails legal?

It depends on where you and the recipient are. Rules such as CAN-SPAM, GDPR and others differ, especially for commercial email, so check the laws that apply to you.

What is a good cold email opening line?

One that is specific to the reader: a recent post, a launch or a shared connection. Avoid generic compliments and long introductions about yourself.

Keep reading