How to write a cold email, line by line: what the subject, the opening, the value line, the ask and the signature each have to earn.

How to write a cold email in six lines

How to write a cold email comes down to six lines, each with one job. A subject line that earns the open, an opening line that proves you wrote this for one person, a reason for writing, a value line, a single ask, and a signature that shows a real person with an address.

Everything else is editing. The first draft usually contains all six lines plus a paragraph about your company, three questions, and a closing that apologizes for existing. The craft is in cutting those and keeping the six.

This page is about composing that message. The cold email guide covers the list, the sending setup, deliverability and the metrics, and the templates section holds ready structures to start from.

Cold email structure: what each line has to earn

A cold email structure is not a layout. It is a sequence of small promises: each line has to buy the attention needed to read the next one. If a line does not do that, it is not short enough or not specific enough.

The same cold email structure works for a first touch and for a follow-up. In a follow-up the reason changes from a trigger to whatever you are adding, and the value line usually shrinks to a single clause.

Three decisions to make before you write a word

Most weak cold emails are weak before anyone starts writing. Writing cannot fix a reader who does not own the problem, and it cannot invent a reason to write that does not exist.

• One named reader. Not a segment, not a persona. A person whose job would be easier or harder depending on the problem you solve.
• One true reason for writing. Something you can point at: a post, a job ad, a launch, a change in their market. If you cannot find one in two minutes, pick a different reader.
• One thing you want back. Decide the reply you are trying to earn before you write, because that decision quietly shapes every other line.

Fit comes first: if the reader does not match your ideal customer profile, better copy only makes the mismatch more obvious. Choosing who to write to is a targeting problem, and it is worth more time than the copy.

The subject line, written last

Write the subject line after the body, because until the body exists you do not know what the cold email is about. Drafting it first tends to produce a label for your offer instead of a note about the reader's work.

Four tests, and the subject has to pass all four:

• True. It describes what is actually inside. Under the CAN-SPAM Act, a subject line that misrepresents the message is a violation, not just bad practice.
• Short. Three to six words is a sensible ceiling. Longer subject lines get cut mid-thought in the list view on a phone.
• Theirs. It names something from the reader's world: their site, their hire, their post, their market.
• Flat. No capitals, no exclamation marks, no "Re:" on a message that is not a reply. Hype reads as mass mail.

A subject that sounds like an internal note from a colleague beats one that sounds like a campaign. Our page on professional email subject lines covers the patterns in more detail.

The opening line: the preview window decides the rest

In most inbox previews the reader sees the sender, the subject and the start of the first line. That fragment is the whole audition. If it starts with your name and your company, the cold email is already read as an ad.

The opening line has one job: prove that a person looked at this reader before writing. Ready lines for each type are in the cold email opening lines library. It does that by naming something true and recent that you could not have known without looking.

Skip the greeting industry entirely: no "I hope this email finds you well", no "I wanted to reach out". Both are throat clearing, and both open the sales emails this reader has already learned to delete.

A first name and a company name merged into a sentence is not an opening line. Every automated tool does that, so the reader's filter is tuned to it. One real observation does more than ten merge fields. See email greetings for what to put before the first line.

Three cold email openings, rewritten

The three pairs below were written for this page. Each one keeps the same sales offer and the same prospect, and changes only the first sentence of the cold email. Read the left column as the reader would: as the opening of a message from a stranger.

The pattern is the same in all three cold emails: replace a claim about the prospect with a fact you can point at. A fact can be wrong, and that is the point. A compliment cannot be wrong, which is why it carries no information.

Notice how much shorter the specific versions are than the vague ones. Writing cold emails gets faster once the opening line comes from research instead of from a search for something flattering to say.

The reason for writing: why you, why them, why now

The reason for writing is the bridge between the fact you found and the problem you solve. It is the line most drafts skip, and its absence is why so many cold emails read as random to the prospect.

Write it as a consequence, not as a claim. "You opened a second location" is an observation. "Most operations leads find the second site is where the weekly schedule stops fitting in a spreadsheet" is a reason for writing.

Three things make the reason land:

• It is theirs, not yours. The trigger belongs to the reader's company, not to your quarter or your new feature release.
• It is timed. Something recent makes the problem live now rather than someday.
• It is falsifiable. The reader can think "that is not true here" and tell you, which is still a reply worth having.

Relevance beats personalization

Personalization is what you know about the prospect. Relevance is whether the cold email is about something the prospect is already working on. A message can be heavily personalized and still irrelevant, and the reader deletes it just as fast.

Relevance is cheaper than it looks. Instead of researching every prospect for ten minutes, group prospects who share one specific situation: the same trigger, the same role, the same market. Write one relevant cold email for that group, then spend your two minutes per prospect on the opening line alone.

The trade is deliberate. Research time should be proportional to the value of the account: a handful of large prospects earn a hand-written cold email each, while a list of similar companies earns a strong group message with one line written per prospect.

The test for relevance is simple. If the prospect would answer "so what?" after your reason for writing, the email is about your product and not about their work, however many merge fields it contains.

The value line: one outcome in their language

The value line answers a question the reader is now willing to ask: what would be different if this problem were handled? One outcome, described in the words their role uses, beats a feature list every time.

Three rules hold the line together. Name the role you help, not the market. Name a change in their day, not a capability in your product. Keep it to one sentence, because a second sentence almost always adds a feature.

The examples above were written for this page. If you use a customer as proof, name only customers who agreed to be named, and use a result you can show if asked. A value proposition that cannot survive a follow-up question is not proof.

The ask: one question a busy person answers in a line

The ask sets the price of replying. A demo request from a stranger costs the reader half an hour and a decision. A yes or no question costs five seconds. Most first touches should charge the second price.

One ask per email. Two asks do not double your chances; they make the reader choose, and the easiest choice is to close the message. Phrase it as a question so that "no" is also an answer you can use.

Avoid closing lines that ask for nothing. "Looking forward to hearing from you" is polite and empty, and it usually sits where the real question should be.

The sign-off, the signature and what the law requires

The sign-off is two words and a name. "Thanks," or nothing at all, then your first name. Long valedictions and job-title stacks push the ask further from the reader's thumb. Our guide on how to end an email covers the options.

The signature is where compliance lives. In the United States, the Federal Trade Commission's CAN-SPAM guidance sets requirements for commercial email, and a cold sales email is commercial email:

• Accurate header information. The from name, reply-to address, originating domain and routing information must identify the sender truthfully.
• An honest subject line. It has to reflect the content of the message.
• A valid physical postal address. A real street address, registered post office box or private mailbox the recipient could use.
• A clear opt-out. A conspicuous explanation of how to stop receiving marketing email from you.
• An opt-out that keeps working. The FTC says the mechanism must be able to process requests for at least 30 days after you send.
• Prompt action. Opt-out requests must be honored within 10 business days, and you cannot charge for it or make the person give a reason.
• Your responsibility either way. Hiring an agency to send for you does not transfer the legal responsibility.

The FTC also requires commercial messages to disclose clearly that they are advertisements. Rules outside the United States are stricter, and several markets require consent before the first message, so check each market before you send there.

How long a cold email should be

Short enough to read on a phone without scrolling, which in practice means the six lines and nothing else. Length is not a target in itself: it is what falls out when every line has a job and no line has two.

The useful test is not a word count. Read the cold email and ask, for each sentence, which of the six jobs it does. Sentences that do none are cuts, and there are usually three or four of them in a first draft.

• Longer is defensible when you are answering a question the reader asked, or writing to a technical evaluator who wants specifics.
• Shorter is almost always right for a first touch to a senior reader who has never heard of you.
• Length lies when you compress by deleting white space. Four dense lines are harder to read than six airy ones.

Tone: write the way you would speak to a colleague

Cold email tone fails in two directions: too formal, which reads as a letter from a vendor, and too familiar, which reads as a stranger who wants something. The target is the register you would use writing to a colleague in another department.

The plain language guidance published by the United States government for public writing transfers directly: use the active voice, the present tense, the strongest form of the verb, shorter words and short sections. Passive constructions hide who does what, which is exactly what a reader is trying to work out.

Reading the draft aloud catches most tone problems in under a minute. Anything you would not say to a colleague standing at their desk comes out. Our entry on salesy language covers the vocabulary that triggers the reaction you are trying to avoid.

The phrases to cut on every pass

These are the lines that survive from draft to draft because they feel like manners. They are filler, and they push the real content below the preview window.

How to write a cold email, step by step

1. Pick the reader and read for two minutes

   One named person whose role owns the problem. Read their recent posts, the company news and the open roles, and write down the one fact that surprised you.

2. Write the ask first, on a scratch line

   Decide the exact reply you want before you write anything else. Everything above the ask exists to make that one question reasonable.

3. Draft the opening from the fact, not the product

   One sentence that names the thing you found. If the sentence would still be true for another company in the same industry, it is not specific enough.

4. Add the reason for writing

   Connect the fact to the problem as a consequence: what companies at that moment usually run into. Let the reader disagree with it.

5. Write one value line, then delete the second

   One outcome for their role, in their vocabulary. The second sentence you want to add is almost always a feature. Cut it.

6. Write the subject line from the body

   Three to six words taken from the opening line or the reason. Lowercase, honest, and specific to this reader.

7. Run the four editing passes

   Cut, specify, soften the ask, then check compliance. Read it aloud on a phone screen before it leaves your outbox.

A worked rewrite, line by line

The two cold emails below were written for this page. Both make the same offer to the same reader: an operations lead at a company that just opened a second site. The first is the draft most people send. The second is the same offer after the passes above.

Before

Subject: Partnership opportunity for {{companyName}}

Hi {{firstName}},

I hope this email finds you well! My name is {{senderName}} and I am
the Head of Growth at {{senderCompany}}, a leading provider of
workforce management solutions for businesses of all sizes.

Our platform offers real-time scheduling, advanced analytics and
seamless integrations, and we have helped countless organizations
transform their operations and unlock new efficiencies.

I would love to hop on a quick 30-minute call to walk you through a
demo and explore potential synergies. Would Tuesday or Thursday work?
You can also grab a slot here: {{link}}

Looking forward to hearing from you!

Best regards,
{{senderName}} | Head of Growth | {{senderCompany}}
{{phone}} | {{website}} | LinkedIn | X | "Making work work"

After

Subject: scheduling after the {{city}} opening

Hi {{firstName}},

You posted three shift supervisor roles for the new {{city}} site
last week.

Most operations leads tell us the second site is where the weekly
schedule stops fitting in one spreadsheet, usually within a quarter.

We help operations leads publish one schedule across sites instead of
rebuilding it per location after every hire.

Is that already handled at {{companyName}}, or worth a short reply?

{{senderName}}
{{senderTitle}}, {{senderCompany}}
{{postalAddress}}
Tell me to stop and I will not write again.

The rewrite is shorter, but length was not the goal. Every cut came from a line that did none of the six jobs, and the two lines that were missing, the reason and the opt-out, were added.

Four editing passes before you send

Write badly on purpose, then edit in passes. Each pass looks for one thing, which is faster and more honest than trying to improve everything at once.

1. The cut pass. Delete every sentence that does not do one of the six jobs. Start with the first two sentences, which are usually both throat clearing.
2. The specificity pass. Mark every phrase that would still be true for a different company. Replace each one or delete it.
3. The ask pass. Count the questions. If there is more than one, keep the cheapest and remove the rest. Check that "no" is an answer.
4. The compliance pass. Honest from name and subject, a postal address, a working way to opt out, and a promise you can keep about stopping.

Then read it aloud on a phone. The parts you stumble over are the parts the reader will skim, and the last line you reach before losing interest is where your cold email actually ends.

The pre-send check

Writing cold emails faster, without sending the same one twice

Sales teams do not write one cold email. They write a batch, and the writing time per prospect is what decides whether the batch stays relevant. Splitting the work into two passes keeps quality up and sending time down.

In the first pass, write the group message for one segment: the reason for writing, the value line and the ask. In the second pass, go prospect by prospect and write only the opening line and the subject. That second pass is the part that cannot be automated honestly.

Two habits protect the batch. Keep the segments small enough that the reason for writing is true for every prospect in them, and stop sending the moment you notice you are writing openings you do not believe.

Software helps with the sending, the sequencing and the research, and it can draft opening lines. It cannot tell you whether a fact is true about this business, which is the one job the opening line has. Check every generated detail before the email leaves.

The volume question is really a targeting question. If you cannot write a relevant cold email to a prospect, that prospect does not belong on the list, and no amount of sending software fixes it. The list and the sequence decide most of it, long before anyone opens a blank draft.

How to tell whether the writing is working

Cold email copy is testable, but only if you change one thing at a time across a batch of emails and judge it on the right number. Change the subject line for a whole segment of prospects, send, and leave the body alone until you have an answer.

Judge the change on replies, not on opens. Open tracking is unreliable enough that a subject line can look like a winner while producing nothing, which is why the metrics for cold email are counted on answers.

Give each version enough prospects and enough emails to mean something, and remember that a small list tells you very little either way. Two replies more than last week is a mood, not a result.

The fastest feedback is not statistical. Read the replies you do get: people tell you exactly which line they answered, which line confused them, and when they thought the email was automated.

Formatting: what the email should look like

A first cold email should look like a note, not like a publication. Plain text, left aligned, no images, no logo, no tracking pixel, and at most one link if a link is genuinely useful.

• One idea per paragraph, with a blank line between. Two lines of text per paragraph is plenty on a phone.
• No bold, no color, no font changes. Formatting that a colleague would not use marks the message as a campaign.
• Greeting on its own line. "Hi {{firstName}}," then a blank line, then the opening sentence.
• No attachments in a first touch. Offer the document and send it when they say yes.

How you introduce yourself matters less than where you do it. The signature carries it, so the body does not have to. Our guide on how to introduce yourself in an email covers the cases where a short introduction belongs in the body.

What changes when the reader changes

The six lines stay. What moves is the vocabulary of the value line and the size of the ask. A technical evaluator will read more detail than a chief executive, and a referral warms the ask enough to make a meeting request reasonable.

For the messages after the first one, see the sales follow-up email template and the guide to writing a follow up email after no response, which is a different writing problem from this one.

Writing the follow-up emails, not just the first one

Most cold email outreach is a short sequence of emails, so the writing problem does not end when you send the first message. A follow-up is written under a harder constraint: the prospect has already seen your best reason for writing and did not reply.

That constraint sets the rules. Reply in the same thread so the context travels with the message. Write fewer words than the email before it. Add one new thing, and ask the same question in different words.

• The new thing carries the email. A resource, a second angle on the problem, or something that changed since you wrote. A follow-up with nothing new in it is a request for attention you have not paid for.
• Do not restate the first email. The prospect can scroll down. Repeating your pitch doubles the length and halves the chance anyone reads either version.
• Keep the same voice. Escalating in tone across a sequence, from friendly to wounded, is the fastest way to turn a quiet prospect into a complaint.
• Write the last one as an exit. Ask whether to close the thread, and whether someone else owns the problem. It is the easiest email in the sequence to answer.

How many to send, how far apart and which channels to mix with email are cadence questions, not writing questions. The sales cadence guide covers the timing and the channel mix around these emails.

Mistakes that ruin an otherwise good cold email

• Opening cold emails with your name, your company or your hope that the email finds them well.
• Personalization that is only a merge field, which mass sending tools also produce.
• A value line built from features, with no outcome the reader recognizes.
• Two or three asks, so the reader has to decide which one to answer.
• A calendar link in the first email, which asks a stranger to commit time before any interest exists.
• Claims with numbers behind them you could not show if the reader asked.
• A signature with banners and social links but no postal address or opt-out.
• Sending the cold email without reading it aloud, or without checking it on a phone.
• Judging the copy on opens rather than on replies, which the metrics section of the hub explains.

The skeleton to write into

The structure below is the six lines with the specifics removed. It is a shape to fill, not a message to send: the opening line and the value line have to be written for one reader, every time.

Subject: {{three to six words from the opening line}}

Hi {{firstName}},

{{one true, recent fact about the reader or the company}}

{{the consequence of that fact for someone in their role}}

We help {{role}}s {{one outcome, in their words}}.

Is that already handled at {{companyName}}, or worth a short reply?

{{senderName}}
{{senderTitle}}, {{senderCompany}}
{{postalAddress}}
Tell me to stop and I will not write again.

Frequently asked questions