In this article
Good cold email subject lines look like a note from a person, not an ad: three to six words, the business's name or something true about it, and no sales vocabulary. A subject line has one job, getting the email opened; the first line and the closing question are what earn the reply. Below are 40 sales email subject line examples grouped by situation, the ones to avoid, and a simple way to test your own.
The rules of a good sales email subject line
In an inbox, a shop owner sees the sender's name, the subject line and the first words of the body. In about a second they decide whether this is a person writing about their business or a mass mailing. So the subject does not need to sell; it needs to look personal and relevant. "a question for Café Lumière" beats "Grow your revenue today". This article complements our cold email templates for local businesses, which cover the body of the message.
Short, lowercase, no forced punctuation
On a phone, subject lines are cut after roughly 30 to 40 characters, so aim for three to six words. Write the way you would to a colleague: at most a capital at the start, no ALL CAPS, no exclamation marks, no emoji.
Personal, with one real detail
The business's name, its city or its trade is enough to show the email did not go to 10,000 people. A real fact works even better: its reviews, the missing website, a new location. In Prospya's campaigns, the {name}, {city} and {trade} variables are replaced for every business, and the live preview shows the subject exactly as a real recipient will see it.
No words that smell like advertising
"Free", "offer", "discount", "urgent", "last chance", prices and percentages read like an ad to filters and to humans. Keep them out of the subject line. And stay honest: the subject describes what the email contains, with no fake "Re:" or "Fwd:".
40 cold email subject line examples, by situation
Brackets show what you replace. These are examples: adapt them to your offer and to the tone of the trade. If you write to French businesses, write the subject in French; the patterns below translate directly.
The short question (works almost everywhere)
- a question for [business name]
- [business name]: quick question
- quick question about [business name]
- [first name], a question
- are you the right person?
The observed fact
- your reviews on [business name]
- [business name] without a website?
- your menu online
- your weekend bookings
- your listing in [city]
- saw your Instagram
- your opening hours online
The local angle
- a [trade] in [city]
- for [trade]s in [city]
- [city]: an idea for [business name]
- passing by [street name]
- neighbour in [district]
The idea or the outcome
- an idea for your bookings
- fewer missed calls
- faster quotes
- busier Tuesdays?
- an idea for your shop window online
- filling empty slots
The referral or common ground
- [name] suggested I write
- [business name] and [neighbouring business]
- like other [trade]s in [city]
Subject lines by trade
| Trade | Example subject line |
|---|---|
| Restaurant | your menu online |
| Hair salon | your online appointments |
| Bakery | your Sunday orders |
| Plumber, electrician | your quote requests |
| Hotel | your direct bookings |
| Beauty salon | your last-minute slots |
| Car repair shop | your service appointments |
| Real estate agency | your listings in [city] |
Follow-ups (in the same thread)
- Re: a question for [business name] (a genuine reply to your first email)
- following up
- an example for [business name]
- does this ring a bell?
- one last question
- should I close the file?
- bad timing?
- someone else I should ask?
After a call or a visit
- after our call
- as promised, [business name]
- the example I mentioned
- your quote, [business name]
- the document from this morning
- thanks for your time today
For a follow-up, reply in the thread of your first email: the subject stays the same with "Re:", which is honest because it really is the same conversation. Our sales follow-up sequence covers timing.
Subject lines to avoid, and what to use instead
| Avoid | Why | Better |
|---|---|---|
| EXCLUSIVE OFFER!!! | caps, punctuation, ad words | an idea for [business name] |
| Discover our innovative solution | about you, vague | your online appointments |
| Re: our meeting (no meeting) | misleading, reported as spam | a question for [business name] |
| 50% off your new website | price in the subject, spam filters | [business name] without a website? |
| Partnership | one vague word, seen a thousand times | [city]: an idea for [business name] |
| Sales proposal from Agency X | announces a brochure | your reviews on [business name] |
| Hello | says nothing, looks like spam | quick question about [business name] |
A perfect subject line will not rescue poor targeting. Writing "your direct bookings" to a restaurant that does not take bookings achieves nothing. The best subject lines come from a precise list: one trade, one city, one criterion. For example restaurants in Paris: Prospya lists 8,013, 3,940 of them with an email address, and you can narrow to the ones without a website.
How to test cold email subject lines
Open rates have become an unreliable metric: some mail apps load tracking images automatically, which counts as an open even when nobody read the email. Judge subject lines on replies instead:
- Keep the same body and change only the subject.
- Send each version to a comparable list: same trade, same area, at least a few dozen businesses.
- Count replies (positive and negative) over 5 to 7 days, follow-ups included.
- Keep the winner and test a new variant against it.
With small volumes, a gap of a few replies is often luck, so do not conclude too fast. We go deeper in our article on cold email reply rates.
The subject is not alone: sender name and preview
- Sender name: "Julie from Studio Web" earns more trust than "Info" or "Sales team".
- Preview text: the first words of the body show after the subject. Start with the business's name or the fact you noticed, not "I hope this email finds you well".
- Deliverability: a great subject line is useless in the spam folder. Gradual sending, a configured domain and checked addresses matter more; see our guide to cold email deliverability.
Writing and sending subject lines with Prospya
Email campaigns in Prospya start from a search ("Email these businesses") or from your saved leads. Pick one of five templates (website, social media, software, coaching, supplier) or let the AI write the email from one sentence about what you sell. The subject line is editable with the {name}, {city}, {trade} and {sender} variables, writing tips appear as you type, and you can send yourself a test before launching.
Emails go out gradually (at most 200 per day per account) with an unsubscribe link in every message. Replies land in your own mailbox, and every business you wrote to moves to "Contacted" in the prospecting CRM. Agencies prospecting for clients can also see our page for marketing agencies.
FAQ
How long should a cold email subject line be?
Aim for three to six words, roughly 25 to 40 characters. On a phone, where many business owners read email, longer subjects get cut off. A short subject also looks more like a personal message than a newsletter, which makes it more likely that the email is opened and actually read.
Should I put the company name in the subject line?
The name of the business you are writing to, yes: it is the simplest and most effective personalisation. Your own company's name, rarely, because it turns the subject into an announcement. It already appears in the sender name and the signature, which is enough to identify you clearly.
What words should you avoid in sales email subject lines?
Avoid "free", "offer", "discount", "urgent", "last chance", prices, percentages, capital letters and strings of exclamation marks. They trigger spam filters and make the email look like advertising. Use neutral words tied to the owner's day-to-day instead: their reviews, their bookings, their quotes, their opening hours.
Is it OK to use "Re:" in a cold email subject line?
Only for a genuine follow-up sent as a reply to your first email. Adding "Re:" to a first message pretends a conversation already exists: it is misleading, it leads to spam reports and it hurts your sender reputation. In prospecting, both the sender and the purpose of the message should stay transparent.
How do I know if a subject line works?
Compare two subject lines with the same body, sent to comparable lists, and count replies rather than opens, which have become unreliable. Wait 5 to 7 days and send at least a few dozen emails per version before deciding, because small differences are often down to chance.
Do I need a different subject line for every prospect?
You do not need to rewrite each one. A template subject with the business's name, city or trade already makes it personal for every recipient. Keep fully custom subject lines for your best prospects, when you have spotted something specific about them, such as a new location or a missing website.