What a personalized first line should and shouldn’t say
How to write an honest, specific first line for a cold B2B email: what to reference, what to avoid, and how to keep it accurate and lawful.
A first line is the sentence after the greeting. Its job is to show, quickly, that you looked at this company and are not sending the same email to everyone.
What it should do
- Reference something specific and public: a service area, a new location, a recent hire posting, a certification the company lists on its own site.
- Be checkable: the reader should recognize it as true. Keep a note of the source.
- Connect to why you’re writing in the next sentence, without forcing it.
What it shouldn’t do
- Fake familiarity: “Loved your recent post!” when you didn’t read it.
- Use personal details: family, health, home address or anything unrelated to the business.
- Flatter vaguely: “Impressive company!” says nothing.
- Make claims about them you can’t back up, such as guessing revenue or problems.
Example · fictional companyWeak: “Hope you’re well! Your company looks great.”
Better: “Saw that Example Mechanical (fictional) added a second service location in Toledo this year.”
Better: “Saw that Example Mechanical (fictional) added a second service location in Toledo this year.”
Keep the rest of the email lawful
In the US, commercial email must follow the CAN-SPAM Act: accurate sender information, a non-deceptive subject line, a valid physical postal address, a clear way to opt out, and honoring opt-outs promptly. A good first line doesn’t replace any of that.
Every Guideily Lead List includes a first line per lead, with its public source noted.
Published by Guideily LLC · November 3, 2026. General information, not legal or financial advice.