Most small business owners know they should be emailing their customers. They have a box of business cards, a spreadsheet of past clients or a booking system full of addresses, and every so often they mean to send something. Then the week fills up, nothing goes out, and months later the list is out of date and the idea feels like one more thing they never got to.

Owners who do stick with it often find it pays off. In Constant Contact's Small Business Now 2025 research, a June 2025 survey of 2,500 small business decision-makers in the US, UK, Canada and Australia, 44 percent named email as their most effective marketing channel, up from 23 percent in 2024. That is what owners report rather than a measured result, and Constant Contact sells email software, but it is a sign that email is earning its place for many small businesses.

This guide covers how to get started without overcomplicating it: building a list the right way, choosing a platform, deciding what to send and how often, writing emails people open and staying on the right side of the rules. It is written for owners doing it themselves, though the same steps apply if you hand it to an agency such as Optuno.

Build your list the right way

Your list is the foundation, and the most valuable addresses are the ones you already earn from real customers. Ask for an email address at checkout, when someone books and on your website's forms, and offer a separate, clearly labeled option for marketing emails, so collecting an address to send a receipt is never confused with permission to send promotions. Say plainly what subscribers will get, such as seasonal reminders and the occasional offer.

Make signing up easy and worth it. A simple form on your website, a sign-up sheet or QR code at the counter and a line in your email signature all help. A small incentive can work too, such as a first-visit discount or a useful seasonal checklist, as long as it is relevant to the people you want to reach.

Never buy or rent a list. Purchased addresses belong to people who have never heard of you, so they ignore or report the messages, which damages your ability to reach the inbox at all. A small list of real customers is worth far more than a large list of strangers.

Keep the list tidy as it grows. Remove addresses that bounce, and consider retiring people who have not clicked, replied or bought anything in a year; opens alone are an unreliable signal, because some email apps report them automatically. These older posts have more ideas on increasing email subscribers if you want to grow faster.

Choose a platform and set it up properly

Send marketing email through a dedicated email marketing platform rather than your regular inbox. These services handle sign-up forms, unsubscribe links, templates and reporting, and they are built to send in volume without your messages being treated as spam. Most offer free or low-cost plans for small lists, so start simple and upgrade only when you need more.

When comparing platforms, look at ease of use, how well they connect to your website or booking system, the quality of their templates, automation features and price as your list grows.

Setup matters as much as the choice. Send from an address at your own domain, such as hello at your business name, rather than a free webmail address. Then make sure your domain's email authentication is in place. Gmail now requires everyone sending to its users to set up SPF or DKIM, and senders of more than 5,000 messages a day to use both SPF and DKIM, plus DMARC and one-click unsubscribe. Yahoo has similar rules, and Microsoft has required SPF, DKIM and DMARC from senders of more than 5,000 emails a day to Outlook.com since May 2025. Your platform's help pages will walk you through the settings, and whoever manages your domain can add the records.

Decide what to send and how often

The best small business emails are useful first and promotional second. Think about what your customers want to hear from you: seasonal reminders, helpful tips, new services, events, behind-the-scenes stories and the occasional offer.

A simple plan for most local businesses is one regular email a month, plus a few timely messages around your busy seasons and holidays. A heating company might send a fall tune-up reminder and a winter safety tip. A salon might send a monthly note with new styles and open appointment times. A restaurant might announce a new seasonal menu.

Automated emails are worth setting up early because they work while you are busy. A welcome email for new subscribers, a thank-you after a first purchase and a reminder when a regular service is due are three good places to start.

Consistency matters more than frequency. A short, useful email every month builds more trust than a burst of messages followed by silence. If text messages fit your customers better for urgent or short updates, this guide to SMS marketing for small businesses covers that channel, including consent.

Before you start emailing customers to bring them back, it helps to know how new ones find you. Optuno's free local SEO report gives a snapshot of your rankings, listings, and reviews.

Write emails people open and read

The subject line decides whether anyone reads the rest, so make it clear and specific. Your fall tune-up spots are open tells people exactly what is inside, while a vague subject like Monthly update gets skipped. Keep it honest, too, because a subject line that misleads people costs trust and can break the law.

Send from a recognizable name, either your business name or your own name plus the business, so people know who it is before they open it.

Keep the email short and easy to scan on a phone. Lead with the most important point, use a few short paragraphs, add one good photo and include one clear call to action, such as Book now or Reply to reserve your spot. Emails with five different requests tend to get none of them answered.

Write the way you talk to customers in person. A friendly, plain voice from a local business owner stands out in an inbox full of corporate newsletters.

Finally, send yourself a test before every campaign, check it on your phone and click every link. This older post has more tips on improving email open rates.

Stay compliant with CAN-SPAM rules

In the United States, commercial email is covered by the CAN-SPAM Act, and the FTC's compliance guide sets out the main requirements. Do not use false or misleading header information, and do not use deceptive subject lines. Identify the message as an ad where that applies. Include your valid physical postal address. Tell recipients how to opt out of future marketing email, and honor opt-out requests within 10 business days. You are also responsible for what others do on your behalf, so these rules apply even if an agency or platform sends for you.

The penalties are serious. The FTC says each separate email that violates the law can bring penalties of up to fifty-three thousand eighty-eight dollars, the inflation-adjusted figure in effect since January 2025.

In practice, a reputable email platform handles much of this for you by adding an unsubscribe link and your address to every message and processing opt-outs automatically. Your job is to email only people who agreed to hear from you, keep subject lines honest and make sure your footer details are current. Yahoo also asks bulk senders to honor unsubscribes within two days, so prompt processing is the safe habit.

Measure what matters and keep improving

Every platform reports opens and clicks, and they are worth watching for trends. Treat open rates with some caution, though, because privacy features in some email apps can make opens look higher than they are. Clicks, replies and bookings tell you more about whether an email worked.

The most useful measure for a local business is whether emails bring people back: booked appointments, calls, visits and repeat purchases in the days after a send. Note those after each campaign, even roughly, and you will soon see which kinds of emails earn their place.

Test one thing at a time. Try two subject lines, a different day of the week or a different offer, and keep what works. Watch your unsubscribe rate too; a few unsubscribes after each send is normal, but a jump suggests you are sending too often or sending things people did not sign up for.

Most of all, keep going. Email rewards consistency, and a list of customers who know and trust you grows more valuable every year.

If you'd rather hand this off, Optuno's plans cover your website and local marketing with no long-term contracts, no setup fees, and a dedicated contact.

Frequently asked questions

Is email marketing worth it for a small business?
For most local businesses, yes. It costs little, reaches people who already know you and is one of the most direct ways to bring past customers back. Results depend on building a real list and sending useful emails consistently.

How often should a small business send marketing emails?
Once a month is a good starting point for most local businesses, plus a few timely messages around busy seasons. Consistency matters more than volume, and a jump in unsubscribes is a sign to slow down.

How do I build an email list for my small business?
Ask customers for their email at checkout, when they book and on your website's forms, give them a clear choice to receive marketing emails, and tell them what you will send. A sign-up QR code at the counter and a small, relevant incentive can help. Never buy a list.

What should I include in a small business email?
A clear subject line, one main message, a photo if it helps, one call to action, your business name and postal address, and an unsubscribe link. Keep it short enough to read on a phone.

Do I need customers' permission to email them?
CAN-SPAM requires an easy opt-out rather than prior consent in every case, but other countries' laws and email platforms' rules can be stricter, so emailing only people who agreed to hear from you is the safest approach.

What is the best email marketing platform for a small business?
The best one is the platform you will use. Look for an easy editor, good templates, automation for welcome and reminder emails, connections to your website or booking system, and pricing that suits your list size.