The first line of a cold email decides everything
Buyers decide whether to keep reading in the preview pane. Here is how to write an opening line that earns the second sentence — with examples that work and the patterns that quietly kill replies.
Most cold emails are judged before they are opened. The subject line gets the click into the inbox view; the first line — shown in the preview pane on almost every client — decides whether the email is read or archived. If that line could have been sent to anyone, the buyer assumes it was.
What the preview pane actually shows
On desktop Outlook and Gmail, a reader sees the sender, the subject and roughly the first 90 characters of the body. On mobile it is closer to 60. That is one sentence, and often not a full one.
Three openers that work
- The specific observation. Something true about their company that you could only know by looking: a new region on the careers page, a pricing change, a product launch.
- The relevant number. A figure that matters to their role — "Teams your size usually lose 18% of booked meetings to no-shows" — followed, in the next line, by where it comes from.
- The honest reason. "You're hiring three SDRs in Lisbon, so I'm guessing ramp time is on your mind." It names the trigger and the inference in one breath.
Patterns that quietly kill replies
| Opening | Why it fails |
|---|---|
| "I hope this email finds you well" | Spends the preview on nothing |
| "My name is…" | The sender line already said so |
| "I noticed you're the VP of Sales at…" | True of every email they get |
| "Quick question" | Trains readers to expect a pitch |
Personalisation that scales
Personalisation fails at scale when it is decorative: a compliment about a podcast appearance, pasted into an otherwise generic email. It works when the personal detail is the reason for writing. A useful check is to delete the personal line — if the rest of the email still makes sense, the personalisation was decoration.
The best first line is the one that makes the rest of the email feel inevitable.
A simple rewrite exercise
Take your current opener and rewrite it three ways: once as an observation, once as a number, once as a reason. Send each to a small, similar segment for a week. Reply rate on fifty emails is noisy, but a difference of two or three times shows up quickly — and it almost always favours the version a stranger could not have written.