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What does cold email mean?
Published November 11, 2026. Reply numbers from Sales.co sending records, computed November 9, 2026; the FTC guide read November 8, 2026; our pricing read November 11, 2026.
A cold email is a one-to-one email sent to someone you have no prior relationship with, to start a business conversation, such as a sales meeting, a partnership or a job. Done properly, it differs from spam: it goes to one chosen person, names the real sender, and stops when asked.
In Sales.co's own sending, 2,007,540 cold emails sent from October 6, 2025 to October 25, 2026 drew a reply from a real person 0.502% of the time, about one in 199. A reply our sending tool labeled possibly interested came 0.149% of the time, about one in 671.
This page is for founders and sales teams new to outbound who want to know what the term covers before they send their first campaign. It gives the definition, how cold email differs from spam, email marketing and warm email, a real example with its reply rate, what US law asks of it, and the results to expect.
Cold email vs spam vs email marketing vs warm email
The four get confused because they all land in the same inbox. The difference is who gets the message and why.
| Type | Who gets it | Why they get it | How it is sent | Goal | US rule |
|---|---|---|---|---|---|
| Cold email | One chosen person at a business that fits what you sell | The sender picked them; there is no earlier contact | Small batches, each to a named person | A reply and a conversation | CAN-SPAM applies; the FTC says it makes no exception for business-to-business email |
| Spam | Anyone whose address the sender holds | No choice of recipient | Bulk, the same text to everyone | A click or a sale from whoever bites | Often breaks CAN-SPAM: false headers, deceptive subject lines, no working opt-out |
| Email marketing (newsletters, promotions) | People who signed up or bought before | They gave their address | One message to a whole list | Sales and repeat visits | CAN-SPAM applies to the commercial messages |
| Warm email | Someone you have met or were introduced to | An existing relationship | One at a time | Continue a conversation | Covered when its primary purpose is commercial |
Quick pick: if you have never spoken to the person and you are writing to them alone about their business, it is a cold email. If the same text goes to everyone you can find, it is spam, whatever the sender calls it.
A real cold email, with its reply rate
This is the template in our library with the most tracked sends. It went to 2,901 people, got a reply from 4.17% of them and a positive reply from 1.72%. Merge fields are shown in brackets, as stored in the template.
It is about 50 words. It names something the reader did, says in one line what the sender does, and asks for ten minutes. The template library has 163 more, each with its reply rate from 22,274 tracked sends. Template rates come from those tracked sends and are not the same count as the database totals above.
What a cold email contains
- A subject line that is true. Short and about the reader, like the example's "[first name] about [company name]?". The FTC guide says not to use deceptive subject lines. Test yours with the subject line grader.
- An opener about them. One line that shows you picked this person: their podcast, a hire, a launch. It is what separates a cold email from a blast.
- The reason you are writing. What you do, for whom, in one sentence.
- One ask. A small, specific next step, such as a 10-minute call.
- Who you are and how to stop. Your real name, company and postal address, and a clear way to opt out. These are what US law requires, below.
Before sending, run the body through the spam checker, and set up the sending domain as the cold email deliverability guide describes.
Is cold email legal?
In the US, yes, if it follows the CAN-SPAM Act. It covers all commercial messages, and the FTC's compliance guide says the law makes no exception for business-to-business email. The guide's requirements, read November 8, 2026:
- Don't use false or misleading header information.
- Don't use deceptive subject lines.
- Identify the message as an ad.
- Tell recipients where you're located (a valid postal address).
- Tell recipients how to opt out, in a clear and conspicuous way, with an opt-out that works for at least 30 days after you send.
- Honor opt-out requests within 10 business days.
- Monitor what others are doing on your behalf.
Each email that breaks the Act can cost up to $53,088 in penalties, per the same guide. Rules differ outside the US, so check the law where your recipients are before you send to them.
Does cold email still work? Our numbers
Yes, at a low rate per email, which is why volume and targeting matter. These are Sales.co's sending records: 2,007,540 emails from 61 sending workspaces, sent October 6, 2025 to October 25, 2026, with replies counted for 14 days after each send. Each reply is credited to the hour of the email it answered, in Eastern time.
| Emails | Sent | Reply from a real person | Interested reply |
|---|---|---|---|
| All | 2,007,540 | 0.502% (10,072) | 0.149% (2,991) |
| Sent 9 a.m. to 5 p.m. Eastern | 1,091,483 | 0.719% (7,844) | 0.197% (2,147) |
| Sent outside those hours | 916,057 | 0.243% (2,228) | 0.092% (844) |
Follow-ups count too: of the 2,749 interested replies whose step was recorded, 652 (24%) answered a follow-up rather than the first email; the cold email follow-up guide shows when to send them. The cold email statistics page and the best time to send study break these down further.
At one interested reply per 671 emails, 10,000 emails bring about 15 interested replies. For the case that reply rates are falling, read why we think cold email is dying.
What these numbers do not tell you
- "Interested" is the sending tool's label, "possibly interested", not a booked meeting or a sale.
- They are averages across 61 workspaces with different lists and offers. One tight list and a strong offer can beat them; a poor list can fall well below them.
- The send-time rows show when replies came, not that the hour caused them.
- Open rates are not measured here.
- The window ends October 25, 2026.
How to start
You can send cold email yourself with a list and a template, or have Sales.co do it. The service is $2,000 a month for up to 10,000 emails, $2,500 for up to 15,000 and $3,000 for up to 20,000, read from pricing on November 11, 2026. At the rate above, $2,000 for 10,000 emails comes to about $134 per interested reply. The lead generation calculator lets you try your own volume, and the best cold email agencies for small business compares Sales.co with other agencies on price.
Sources
- Reply rates, send hours and follow-up shares: Sales.co sending records, 2,007,540 emails, October 6, 2025 to October 25, 2026, computed November 9, 2026 (also on the conversion rate benchmarks study).
- Example email and template rates: the Sales.co template library, 164 templates, 22,274 tracked sends, read November 8, 2026.
- Legal requirements and penalty: Federal Trade Commission, CAN-SPAM Act: A Compliance Guide for Business, read November 8, 2026.
- Prices: Sales.co pricing page, read November 11, 2026.
FAQ
What is a cold email example?
A 50-word note that names the reader's recent podcast, says the sender helps communities grow their reach, and asks for a 10-minute chat. In our library it reached 2,901 people, with a 4.17% reply rate and a 1.72% positive reply rate.
Is cold emailing legal?
In the US, yes, if it follows the CAN-SPAM Act: true headers and subject lines, a postal address, a clear opt-out and opt-outs honored within 10 business days. The FTC says the law makes no exception for business-to-business email.
What is the difference between cold email and spam?
A cold email goes to one chosen person about their business, says who sent it and stops when asked. Spam sends the same text to everyone it can reach and often hides who sent it.
What is the difference between cold email and email marketing?
Email marketing goes to people who gave you their address, such as subscribers or past buyers. A cold email goes to someone with no earlier contact, one person at a time.
Does cold email still work?
Yes, at a low rate per email. Across 2,007,540 Sales.co emails from October 2025 to October 2026, 0.502% drew a reply from a real person and 0.149% an interested reply, about one per 671 emails.