Cold email that gets opened, read and answered.

What is cold email?

Cold email is an email sent to a person who has never heard from you and never asked to, with a specific reason to start a conversation. In B2B sales it is the first touch of outbound prospecting: one person, one company, one question they can answer in a line.

The "cold" describes the relationship, not the tone. The recipient has no prior contact with the sender, so everything the email needs to earn a reply has to be inside the email: who you are, why this person, why now, and what you are asking for.

Done well, cold email is targeted, researched and short. It goes from a real mailbox on your own domain, to a verified address, about a problem the recipient is likely to have. Done badly, it is spam with a first name merged in, and inbox providers treat it that way.

Cold email is used for sales prospecting, partnerships, recruiting, link building and investor outreach. This guide is written for the sales use, and the rules carry over to the others.

Cold emails still work in B2B for a simple reason: business buyers read email at work, and a relevant message about a problem they own is useful to them. The prospects who reply become clients; the ones who do not simply move on.

What changed is the cost of getting it wrong. Inbox providers filter senders who send irrelevant emails at volume, so the teams that get results from cold emailing are the ones who send fewer, better emails to prospects who fit.

Cold email vs spam vs email marketing

The practical line between cold email and spam is relevance and honesty. A cold email that names a real reason, identifies the sender and lets the reader opt out is outreach. The same email sent to ten thousand unverified addresses is spam, whatever the copy says. For opted-in campaigns, read email marketing campaigns.

Is cold email legal?

In the United States, cold email is legal for commercial messages that follow the CAN-SPAM Act. The law does not require prior consent. It requires honesty and an easy way out. The FTC's compliance guide lists the rules:

• Do not use false or misleading header information: the from name, reply-to and domain must identify the sender.
• Do not use deceptive subject lines.
• Identify the message as an ad where it is one.
• Include a valid physical postal address.
• Tell recipients how to opt out, and honor opt-out requests promptly.
• Stay responsible for messages that others send on your behalf, such as an agency.

Other countries set stricter rules. The EU, the UK and Canada have consent and data protection laws that change what you may send and to whom, so check the rules for each market before you email there.

Inbox providers add their own requirements on top of the law. Google and Yahoo require sender authentication and low spam complaint rates, and they filter senders who miss them, legal or not. The deliverability section covers those.

When cold email works, and when it does not

Cold email works when three things are true:

• The list fits. Every recipient matches the ideal customer profile and has a role that owns the problem you solve.
• There is a reason now. A hire, a funding round, a product launch, a post or a change gives the email a first line that is about the reader.
• The ask is small. A question, a resource or a short call, not a demo request from a stranger.

It fails when the offer has no clear buyer, when the list was bought and never checked, and when the team judges the channel after fifty sends. It also fails for very small deals where the research time per prospect costs more than the sale is worth.

Cold email works best as one channel in a cadence with LinkedIn and the phone, not alone. See prospecting for the full sequence and outbound lead generation for how it fits the pipeline.

How to write a cold email, step by step

1. Pick one reader

   A named person at a company that fits the profile, with a role that owns the problem. Write for that person, not for a segment.

2. Find the reason for now

   Two minutes of research: their LinkedIn posts, the company's news, open roles, the product page. One specific fact becomes the first line.

3. Write the subject line last

   Three to six words, lowercase or sentence case, about the reader's world. It should read like a note from a colleague, not an ad.

4. Open with them, not you

   The first sentence connects the fact you found to a problem they probably have. No "I hope this finds you well", no introduction of your company.

5. Make one point of value

   One or two sentences on how you help people in their position, with a concrete outcome or a customer like them. One point, not a feature list.

6. Ask one easy question

   A question they can answer in a line: interest in a resource, whether the problem is on their list, or a short call. One call to action only.

7. Cut it to under 120 words and send from a real mailbox

   Plain text, no images, one link at most, your name and title. Read it on a phone before sending.

A cold email example, before and after

The example below was written for this page. The first version is the kind of cold email most prospects delete; the second makes the same offer in a way a busy person can answer.

The offer is the same in both. The second version is about the prospect's situation, makes one relevant point, and asks for a reply that takes five seconds. That is what writing a cold email comes down to.

The anatomy of a cold email

Personalization lives in the opening line, and it has to be true. A merged first name and company name is not personalization; every automated email has those. One real observation per email is what separates cold outreach that gets read from outreach that gets filtered.

Cold email subject lines

The subject line decides the open, and the first line decides the reply. Subject lines that work in B2B cold email share four traits: they are short, specific, plain and honest about what is inside.

The examples above were written for this page. Test your own subject lines on replies, not opens, because open tracking is unreliable, as the metrics section explains.

B2B cold email templates

A B2B cold email template is a starting structure, not a finished message. Use it to save time on the shape, then write the parts that must be specific to the prospect and the company yourself:

• Replace every placeholder, and read the email once as the recipient would.
• Rewrite the opening line from your own research on the prospect.
• Match the value line to the product or service the prospect's role actually buys.
• Keep the call to action to one question, and test one template change at a time on replies.

Pick the cold email template by the situation, not by the product you sell. The same B2B sales offer needs a different template for a company that just raised money than for one a customer referred.

The six cold email templates below were written for this page. Each one has placeholders marked in braces and a note on when it backfires. Replace the opening line with something true about your reader; that line is the template's only job.

1. The trigger email

Subject: {{trigger}} at {{companyName}}

Hi {{firstName}},

Saw that {{companyName}} {{trigger}}. Teams at that stage usually hit {{problem}} within the first quarter.

We help {{role}}s at companies like {{similarCustomer}} {{outcome}}.

Worth a short conversation, or is it not on your list this year?

{{senderName}}

2. The resource email

Subject: {{topic}} checklist

Hi {{firstName}},

Your team is hiring {{roleCount}} {{role}}s, so {{problem}} is probably close to the top of the list.

We wrote a one-page {{topic}} checklist from what we see across {{industry}} teams. Want me to send it over?

{{senderName}}

3. The peer proof email

Subject: how {{similarCustomer}} handled {{problem}}

Hi {{firstName}},

{{similarCustomer}} had the same {{problem}} your team is likely facing with {{context}}. They {{outcome}} after {{timeframe}}.

Happy to share what they changed first. Useful, or not a priority right now?

{{senderName}}

4. The direct question email

Subject: {{problem}}

Hi {{firstName}},

Most {{role}}s we talk to at {{industry}} companies of your size spend {{pain}} on {{problem}}.

Is that true at {{companyName}}, or have you already solved it?

{{senderName}}

5. The event follow-up email

Subject: {{eventName}} session on {{topic}}

Hi {{firstName}},

Your question at the {{eventName}} session on {{topic}} stayed with me, especially the part about {{detail}}.

We work on that with {{role}}s at {{industry}} companies. Would a short note on what has worked for them be useful?

{{senderName}}

6. The referral email

Subject: {{referrerName}} suggested I write

Hi {{firstName}},

{{referrerName}} mentioned you own {{area}} at {{companyName}} and might be the right person to ask about {{problem}}.

We helped {{referrerCompany}} {{outcome}}. Is this something your team is working on, or should I talk to someone else?

{{senderName}}

More templates for each touch of a sequence are in the templates section, including the sales follow-up email template.

Cold email follow-up: how many, how often, what to say

Many responses to cold outreach come after the first email, not on it. A cold email follow up is the next message to a prospect who did not reply, and each one should add something the first email did not have.

Follow-ups work because busy recipients miss emails, not because persistence wears them down. A follow-up sequence gives the prospect a second and third chance to see a relevant offer, in the same thread, a few days apart.

How many follow-ups to send without a response: two to four after the first email, spaced a few business days apart, then stop. Stop immediately when the prospect replies, asks you to stop, or tells you who owns the problem instead.

What a good follow-up does:

• It replies in the same thread, so the context travels with it.
• It is shorter than the first email.
• It adds one new thing: a resource, a proof point, a new angle on the problem.
• It asks the same easy question in a different way.

What it never does: "just bumping this", guilt, fake urgency, or a "last chance" that is not the last email.

A cold email follow-up template

Hi {{firstName}},

One more thing that might help with {{problem}}: {{resource}}, which {{similarCustomer}} used when {{context}}.

Happy to send it. Useful, or should I leave it here?

{{senderName}}

The breakup email

The last email in a follow-up sequence makes it easy to say no. Ask whether you should close the conversation, and whether someone else at the company owns the problem. Recipients who were interested but busy often reply to this one, and the ones who were not interested can tell you so in one word.

Personalization at scale

The craft of the message itself, line by line, is in how to write a cold email.

Personalization is the difference between a cold email and a mass email, and it does not have to take long. Two minutes per prospect is enough when you know where to look:

• The person: recent LinkedIn posts and comments, a job change, a talk or a podcast.
• The company: funding, launches, open roles, a new market, a leadership change.
• The context: the tools the company uses, the customers it names, the problems its job ads describe.

Group prospects who share a trigger, such as every company that raised a round this month, and write one strong version for the group. Then personalize only the opening line per person. That keeps research proportional to the value of the account.

AI tools can gather these facts and draft first lines, but every fact still needs a human check before sending (see AI for email marketing). A wrong detail is worse than no detail.

Building a cold email list

Deliverability and reply rates are decided before the first word is written, by the list. A cold email list that works is built, not bought:

1. Write the ideal customer profile: industry, size, region, the roles that buy.
2. Find companies that match, from LinkedIn search, directories and your own customer lookalikes.
3. Find the right people and their business email addresses with a prospecting or enrichment tool; see lead enrichment.
4. Verify every address before sending, and remove role inboxes such as info@ and sales@.
5. Record the lead source on every contact so replies can be traced back.

Bought lists fail twice: the addresses bounce, which damages the sending domain, and the people on them never fit the profile, which damages the reply rate.

Cold email deliverability: reaching the inbox

Deliverability is whether your cold email lands in the inbox instead of spam. It depends on your sending domain's reputation, its authentication, your volume, your bounce rate and how recipients react.

Since February 2024, Google requires senders who send 5,000 or more messages a day to Gmail accounts to authenticate with SPF, DKIM and DMARC and to keep spam complaint rates low, and Yahoo publishes similar sender requirements. Cold email usually sends far less than that, but the same signals decide inbox placement at any volume.

Watch two numbers every week: the bounce rate and the spam complaint rate. If either rises, pause the mailbox, fix the list or the content, and restart slowly.

Sender reputation and sending domains

Inbox providers score each sending domain and mailbox on its history: how many emails bounced, how many recipients marked them as spam, how many replied or moved them out of spam. That sender reputation decides inbox placement more than any single word in the email.

Teams that send cold emails at scale spread sending across several mailboxes on one or two secondary domains, each with its own authentication and warm-up, so a problem on one mailbox does not take down the rest. Every domain still needs relevant, verified sending to keep its reputation.

How to test cold email deliverability

• Authentication check: send a test to a mailbox you control and read the message headers for SPF, DKIM and DMARC passing.
• Inbox placement test: send to a set of seed addresses at major providers and see which land in the inbox, the promotions tab or spam.
• Content check: run the email through a spam checker before a new campaign, and remove links, images and phrases it flags.
• Reputation monitoring: use the provider tools that report domain reputation and spam rates for your sending domain.

Test again after any change to domains, mailboxes, sending tools or templates. Deliverability problems rarely announce themselves; replies just stop.

Cold email software and tools

Cold email software falls into five categories. A small team can start with a normal mailbox, a verification tool and a spreadsheet, and add software as volume grows.

Never run cold email through a marketing email platform built for opted-in lists. Their terms usually forbid it, and complaints on shared sending infrastructure can get the account closed.

Cold email metrics that matter

Open rates are no longer a reliable measure. Apple's Mail Privacy Protection loads images for many recipients whether or not they read the email, so opens are counted that never happened. Judge subject lines and copy on replies.

Benchmarks published by vendors vary widely with list, offer and market. Compare your own campaigns to each other, changing one thing at a time.

Cold email mistakes to avoid

• Sending to a bought, unverified list.
• Emailing from your main company domain without separate mailboxes.
• Skipping SPF, DKIM and DMARC.
• Opening with your company instead of the reader.
• Fake personalization: a merged first name and nothing else.
• Three questions and a calendar link in one email.
• HTML designs, images and many links in a first touch.
• Follow-ups that only say "bumping this".
• Judging the channel on open rates.
• Ignoring opt-out requests or sending after someone asked you to stop.

Frequently asked questions