In short
Cold emails get replies when they go to well-targeted prospects, reference something relevant to the recipient, focus on a problem they care about, keep the message short and end with a low-effort question. Staying out of spam requires proper domain authentication (SPF, DKIM, DMARC), gradual warm-up, low volumes per inbox and an easy opt-out.
Most cold emails fail before they are read. They land in spam, go to the wrong people, or open with a paragraph about the sender. The emails that work are the opposite: delivered, relevant and easy to reply to.
Part 1: Deliverability comes first
Authenticate your domain
Set up SPF, DKIM and DMARC records for any domain you send from. Major mailbox providers, including Google and Yahoo, have tightened requirements for senders, and unauthenticated email is far more likely to be filtered.
Use separate sending domains
Many businesses send outreach from a secondary domain, such as a variation of their main domain, to protect the reputation of their primary domain.
Warm up and stay modest
New inboxes should start with low volumes and increase gradually. Keep daily volumes per inbox modest and spread sending across multiple inboxes if you need more volume.
Keep lists clean
Verify email addresses before sending to minimise bounces. High bounce rates damage sender reputation quickly.
Make opting out easy
Include a clear way to opt out and honour requests promptly. It is good practice, a legal requirement in many places, and protects your reputation.
Part 2: Targeting beats copywriting
The best email in the world will fail if it goes to the wrong person. Define your ideal customer precisely: industry, company size, role, and signals that suggest they need you now, such as hiring, funding, expansion or a new technology.
Part 3: Writing emails that get replies
A structure that works
- Relevant opening: why you are contacting this person specifically
- The problem: a challenge they likely face, in their language
- Credibility: a brief proof point or result
- A low-effort ask: a simple question rather than a demand for a meeting
Example
Subject: question about [specific topic]
Hi [name], noticed [company] is hiring three account executives, which usually means pipeline targets just went up.
We help [type of company] book qualified meetings without adding headcount, using researched, personalised outreach.
Worth a quick look at how that could work for your team?
Principles
- Write about them, not you
- One idea per email
- Plain text, minimal formatting, few or no links in the first email
- Subject lines that look like a normal email between colleagues
- No fake familiarity or misleading subject lines
Part 4: Follow up with value
Many replies come from follow-ups. Each follow-up should add something: a relevant insight, a short case study, a different angle on the problem. End the sequence politely if there is no response.
Part 5: Compliance
Rules differ significantly by country. Some allow B2B cold email with an opt-out; others require consent, and rules often differ for individuals and sole traders compared with corporate addresses. Data protection laws also govern how you collect and store prospect data. Research the rules for each market and document your approach.
Part 6: Measure what matters
| Metric | What it tells you |
|---|---|
| Bounce rate | List quality |
| Reply rate | Relevance of targeting and message |
| Positive reply rate | Whether the offer resonates |
| Meetings booked | Real pipeline impact |
| Spam complaints | Whether you are damaging your reputation |
Open rates have become unreliable because of privacy features in email clients, so focus on replies and meetings.
Our Lead Generation service handles infrastructure, research, personalisation and compliance end to end.
Frequently asked questions
How long should a cold email be?
Short. Most effective cold emails can be read in under 30 seconds: a relevant opening, a clear reason for reaching out and a simple question.
How many follow-ups should I send?
Two to four follow-ups spaced several days apart is common. Each should add something new rather than simply checking in.
Is cold email legal?
It depends on the country and whether you are contacting businesses or individuals. Many jurisdictions allow B2B cold email with conditions such as identifying yourself and offering an opt-out, while others require prior consent. Check the rules for every market you target.