Definition
Cold email is the practice of sending unsolicited, individually-targeted email to prospects with whom you have no prior relationship — typically B2B, where deliverability, relevance, compliance (CAN-SPAM, GDPR), and copy quality determine success.
Cold email survives in the era of social outreach because it works when nothing else does. Email is the only universal B2B channel — every buyer has an inbox, regardless of which social network they use. Done well, cold email books meetings at single-digit cost per meeting. Done badly, it lands in spam and damages your sending domain's reputation for months.
The technical foundation matters more than the copy. Domain authentication (SPF, DKIM, DMARC), warm-up, list quality, sending volume, and reply-to-bounce ratio all govern whether your messages reach inboxes at all. Teams that skip the technical setup send beautifully-written copy into spam folders for months before figuring out why nothing's converting.
Origin
Cold email predates the web — direct mail's lineage runs through Stone & Webster, Ogilvy's direct response work, and Lester Wunderman. Email cold outreach matured through the 2010s with the rise of inside-sales-as-a-service and outreach platforms (Outreach.io, Mailshake, Lemlist).
How it works
- Authenticate the sending domain (SPF + DKIM + DMARC).
- Warm up the domain — gradually ramp send volume over 2–4 weeks before real outreach.
- Build a clean ICP list with verified emails (use tools to validate).
- Write a sequence — opener, follow-up, value message, breakup. 3–6 steps typical.
- Send at sustainable volume (40–80 per inbox per day max).
- Track replies, bounces, opens; pause inboxes hitting bounce rates above 4–5%.
When to use it
Use when
- B2B with definable ICP and accessible email addresses.
- When other channels (LinkedIn, ads) are saturated or expensive.
- For high-LTV deals where cost per meeting can be high and still pencil out.
Skip when
- B2C, in nearly all cases — consumer email regulation is harsher and reply rates are abysmal.
- Without proper authentication. Burning your domain reputation costs months to recover.
- On unverified lists. Dirty lists tank deliverability for everyone you send to.
Key metrics
- Open rate (less reliable post-Apple Privacy).
- Reply rate (5–15% on healthy campaigns).
- Positive-reply rate (1–5%).
- Bounce rate (target under 3%).
- Cost per meeting booked.
Examples
- The cold email sequence delivered a 14% reply rate in the first send.
- Cold email lives or dies on the subject line and the first sentence.
- Domain warm-up took 3 weeks before we sent the first real email.
In practice at Makreate
Makreate's Email Outreach Automation retainer covers domain warm-up, deliverability, list segmentation, and copy — not just blasting templates. A recent client had been sending cold email for six months at a 0.7% reply rate; their domain was effectively grey-listed everywhere. We bought new sending domains, ran a 4-week warm-up, rewrote the sequence around prospect-specific signal, and sent at sustainable volume. First month: 11% reply rate, 4% positive-reply, 28 booked meetings.
Email Outreach Automation →Common mistakes
- Skipping domain warm-up and sending 1,000 cold emails on day one.
- Sending from your primary domain. Burning it costs your real email too.
- Personalisation that's just first-name token replacement.
- Long emails. Cold emails should be 50–150 words, not 500.
- No unsubscribe option. CAN-SPAM and GDPR both require it; ignoring is illegal and counterproductive.
Frequently asked
Is cold email legal?
In the US, yes (CAN-SPAM compliance: identify yourself, offer unsubscribe, don't deceive). In the EU, GDPR allows B2B cold email under "legitimate interest" with caveats. Other jurisdictions vary — research before sending.
Open rates are useless now — what should I track?
Reply rate is the honest metric. Open rates are inflated by Apple Privacy and Google's image-loading patterns; treat them as directional only.
How many emails per inbox per day?
40–80 is a safe ceiling for cold email from a warm inbox. Higher volume requires multiple inboxes.