The cold email that gets a reply is shorter than you think.

A cold email that gets a reply is written for one person, says in the first line why they in particular are being written to, makes one ask, and fits on a phone screen without scrolling. That is the whole recipe. Everything below is what it looks like in practice, and what it rules out.

The first line is the reason

The company is on the board for a reason: an SDR who left in July, two closers hired in the summer, a second office, a job advert. That reason is the first line. "You hired two AEs this summer" earns the second sentence; "I hope this finds you well" earns the delete key. The research that found the signal is the same research the rep read before dialling, so the email and the call say the same thing.

The middle is one paragraph

What that signal usually means for a business like theirs, and the shape of a client who looked like them - a sector, a size, an outcome, never a name they did not agree to and never a price. Three sentences. If it needs a fourth, it needs a different first line.

The ask is one question

Not "would you be open to a quick chat sometime". One specific question that is easy to answer from a phone with a thumb: is this you, is it someone else, is it not now. A reply that says "not me, try Sarah" is a good reply. A reply that says "not now, we just hired" is a better one, because now there is a date.

Nothing to open

No attachment, no deck, no calendar link on the first touch, no tracking pixel that trips a filter, no image that renders as a broken box. Plain text, or as near as makes no difference. A signature with a name and a company, not a banner.

Length, and why it matters more than tone

Most of the people we write to read email on a phone between two other things. An email that fits on that screen gets read to the end; one that does not gets skimmed for the ask and, if the ask is not visible, closed. We vary the length, the order and the ask on purpose across a campaign, and what gets replies gets written more often. It is nearly always the shorter one.

Sent properly

• From an address on the client’s domain, set up and warmed before the campaign, with SPF, DKIM and DMARC in place.
• In low volume, paced through the day, so the mailbox looks like a person’s because it is one.
• With the inbox rate watched per mailbox, per week, and the sending paused before a problem becomes a reputation.
• As part of the cadence, not instead of it. The email on day one refers to the call on day zero; the call on day three refers to the email.

What this rules out

Templates with a first name and a company name dropped in. "Personalisation" that is a line scraped from a website and bolted onto a pitch. Sequences of five emails and no calls. Anything written to be sent a thousand times. The test is simple: could this email have been sent to anyone else? If it could, it will read like it was.