How to write a cold email for sales

To write a cold email, pick one specific person and one reason to contact them now. Use a short, plain subject line, open with a line about them rather than you, state the problem you solve in one or two sentences, add one piece of proof, and end with a single easy question. Aim for roughly 50 to 125 words in plain text.

Part	What it does	Rough length
Subject line	Gets the email opened without sounding like an ad	2 to 5 words
Opening line	Shows why this person, and why now	1 sentence
Problem and offer	Names a problem they likely have and what you do about it	1 to 2 sentences
Proof	Makes the claim believable	1 sentence
Call to action	Asks for one small next step	1 question
Sign-off	Real name, role, a way to opt out	2 to 3 short lines

A cold email is a message to someone who has not heard from you before and did not ask to. That means the reader owes you nothing, and they decide in a few seconds whether to read on. Good cold emails are short, specific to the reader, and easy to answer. If you want the background on what counts as a cold email, see what is a cold email.

The five parts of a cold email

Most effective sales cold emails follow the same shape. You do not need a template, but you do need each of these parts.

A subject line that reads like a colleague wrote it. Two to five plain words, often referencing the reader's company or the trigger for your email. Avoid clickbait, fake "Re:" prefixes and all caps. A subject that misleads gets you opened once and ignored after.
An opening line about them. The first sentence should prove you picked this person on purpose: a role they are hiring for, a product they launched, a change in their team. It must be true and checkable. A generic compliment ("I love what you're doing") reads as automated.
The problem and your offer, in one or two sentences. Connect the trigger to a problem people in their role commonly have, then say plainly what you do about it. Write about the outcome for them, not your feature list.
One piece of proof. A named customer, a specific result you can stand behind, or a short description of who already uses you. One is enough. Never invent numbers.
One easy call to action. Ask a single question that can be answered in a word or two. "Worth a look?" or "Should I send a two-minute walkthrough?" is easier to say yes to than "Can we book 30 minutes on Thursday?"

Finish with your real name, role and company, and a simple way to opt out. That last part is both polite and, in many places, a legal requirement.

How long should a cold email be

A common target is roughly 50 to 125 words, which fits on a phone screen without scrolling. Shorter is usually better as long as the email still answers three questions for the reader: why me, why now, and what do you want.

Some practical rules:

Keep paragraphs to one to three sentences.
Write in plain text. Heavy HTML, images and multiple links look like marketing and can hurt deliverability.
Use at most one link, and only if it helps. Skip attachments on a first email.
If you need more than 150 words to explain your offer, the offer is probably not clear enough yet.

Follow-ups should be even shorter: one or two sentences that add something new, such as a different angle or a relevant resource, rather than "just bumping this".

A worked example

Say Sam works at Parcelry, a fictional company that sells onboarding software for new SDRs. Sam wants to reach Maya Chen, VP Revenue Operations at Northwind Analytics (northwind.co), because Northwind's careers page lists two new SDR roles posted in the last few weeks.

Subject: Northwind's new SDR roles

Hi Maya,

I saw Northwind posted two SDR roles recently. When a team adds reps quickly, ramp time is usually the first number someone in RevOps gets asked about.

Parcelry gives new SDRs a guided first 30 days inside the CRM they already use, so managers repeat less of the same training.

Would a two-minute walkthrough of how a team your size sets it up be useful?

Sam, Account Executive, Parcelry Not the right person? Reply and I won't email again.

That is about 80 words. The opening is specific and true, the problem is one most RevOps leaders will recognise, and the ask is small. In a real email Sam would add one line of proof, such as a named customer with a similar team, if Parcelry has one it can cite.

Research that makes the first line true

The opening line is where most cold emails fail, usually because the writer had nothing specific to say. Good triggers include open roles, a new leader joining, a product launch, a funding announcement, or a page on their site that describes exactly the customer you serve.

You can do this research by hand, or have an AI agent do it. If you use Leadsets, the scrape_jobs tool turns a careers page into open roles with titles and dates, and scrape_company turns a homepage into what the company sells, who it sells to and key links. Scraping is an add-on on paid plans, with packs from $9 for 1,000 units. The open-source build an outbound prospect list skill shows how an agent goes from an ideal customer profile to people, emails and a send-ready list. Whatever tool you use, read what it found before you send: an agent can draft a first line, but you are responsible for it being accurate.

Check the address and the rules before you send

A well-written email that bounces does more harm than no email, because bounces damage your sending reputation. Before a campaign, verify every address. Leadsets email verification labels each address verified, catch-all, unknown or invalid with a confidence score, and every email returned by enrich_person is already verified. Send to verified addresses, send to catch-all addresses at lower volume, and treat unknown as unconfirmed. For the wider picture, see how to improve email deliverability.

Cold email is also regulated. Laws such as CAN-SPAM in the US, GDPR in the EU and CASL in Canada set different rules on consent, identification and opt-outs. Use your real identity, include a working way to opt out, honour unsubscribes promptly and keep your own suppression list. The details are in is cold email legal.

Common mistakes to avoid

Starting with yourself. "My name is" and "We are a leading" waste the most valuable line.
Asking for too much. A 30-minute call from a stranger is a big ask. Start smaller.
Fake personalisation. Merging a first name and company into a generic body is not personalisation.
Several asks in one email. One question gets more answers than three.
Sending without a plan for replies. Decide in advance how you will handle "not now", referrals and opt-outs.
Judging too early. Measure replies over a meaningful sample before rewriting everything. See what is a good cold email reply rate for how to think about results.

Questions and answers

How long should a cold email be?

A common target is roughly 50 to 125 words, short enough to read on a phone without scrolling. It should still answer why you chose the reader, why you are writing now and what you want them to do. Follow-ups can be shorter still.

What is a good subject line for a cold email?

Two to five plain words that look like they came from a colleague, often naming the reader's company or the reason you are writing. Avoid clickbait, fake reply prefixes and all caps. The subject should honestly describe what is inside.

How many follow-ups should a cold email have?

Many teams send two or three follow-ups spaced several days apart, each adding something new rather than just repeating the ask. Stop as soon as someone replies or opts out. Sending more than that tends to annoy people more than it converts them.

Should a cold email include links or attachments?

Keep a first cold email to plain text with at most one link, and skip attachments. Multiple links, images and attachments make an email look like marketing and can hurt deliverability. Offer to send material if the reader is interested.

What is a good call to action in a cold email?

One small question the reader can answer in a word or two, such as whether a short walkthrough would be useful. Asking for a long meeting with a stranger is a big commitment. A single, low-effort ask usually gets more replies than several options.

Can AI write cold emails for me?

AI can research a prospect and draft an email, and tools such as the Leadsets personalized first lines skill write an opening line from a company's site and hiring. You still need to check that every fact is true and that the address is verified. Sending inaccurate personalisation at scale is worse than sending nothing.

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