Email Marketing for Small Business: A Complete Guide

Whether you're launching your first newsletter or looking to convert more customers, email marketing is one of the best ways to promote your business, and earns its place as part of your overall marketing strategy. With email used by roughly three in four internet users worldwide, according to DataReportal's 2026 Digital Report, your customers are almost certainly already checking their inbox.

From acquiring customers to deepening existing relationships, email is a direct, effective way to communicate with different audiences for your brand. By staying top of mind in your customers’ inbox, you can work to turn one-time visitors into loyal regulars. 

This guide covers what email marketing is and how it works, whether it's worth the investment, how to build your list, choose a platform, and the practices that keep your messages landing in the inbox instead of the spam folder.

What is email marketing?

Email marketing is when businesses send messages directly to a list of customers’ inboxes, via email. Typical marketing emails include newsletters, winback emails, promotions, abandoned cart email, and more.

To design and send messages from your business to customers, you’ll need an email marketing platform. You can send emails manually, curating individual messages based on new products or sales. You can also set up automated emails that trigger when a customer takes a specific action, like making a purchase or abandoning a cart.

To receive these messages, your customers need to share their email address and opt in. They may give their email and consent when placing an online order, filling out a form on your website, or joining a customer loyalty program. 

You can send emails to your full list all at once, or segment your customers based on demographics or spending patterns to send more personalized messages. For example, you might create a segment of customers who made a purchase in the last 30 days, then send them a follow-up email recommending a complementary product or offering a one time discount.

Is email marketing worth it for small businesses?

For most small businesses, email marketing is one of the most cost-effective channels available, with email marketing averaging a return of $36 in sales for every $1 spent to send messages, according to Litmus.

Through email marketing, you can establish direct connections with your audience and strengthen your relationships with customers. Email campaigns can also raise brand awareness and give you valuable insights into customer behavior. 

Email marketing works well in part because your subscribers choose to sign up. Your campaigns reach people who already know your business and want to hear from it, which sets email apart from channels where you’re introducing yourself to strangers.

Building that list is an ongoing effort. Alongside maintaining a positive relationship with your existing audience, you’ll want to keep growing your subscriber base. This requires thoughtful strategies around gathering email addresses and creating a share-worthy email newsletter. You'll also need to determine how often you send emails, whether it's daily, weekly, monthly, or less frequently.

What are the limitations of email marketing?

Email marketing isn’t perfect and does have its tradeoffs. Like any marketing strategy, creating an effective email program takes planning, goal-setting, and marketing analysis. It requires an ongoing supply of content and a subscriber list, so it's not an instant channel for a business with no existing audience or traffic yet.

Sending emails too often can backfire. According to a survey from Litmus, 67% of consumers say the top reason they unsubscribe from a brand's emails is that they're sent too frequently. The research found that many customers prefer weekly emails (32%) or two to three times a week (20%), which gives a good baseline to find a cadence that balances strong engagement against unsubscribe rates.

Not every email you send will land in a customer’s inbox. Validity's 2025 deliverability benchmark puts average inbox placement at 87% worldwide, with spam filters and sender reputation checks stopping many messages before they arrive. Two habits help protect your placement: authenticating your domain, which verifies to inbox providers that emails from your business are legitimate, and cleaning your list by removing addresses that bounce or never engage.

While the return on investment is high, the cost to send emails can add up if you have a large list. Small business owners should plan on incorporating email marketing activities into their annual budgets. Squarespace Email Campaigns offers a range of paid plans to accommodate different businesses. 

What are the different types of marketing emails?

Email is a great medium to keep your customers up to date with the latest news from your business. By sending updates about new products, sales, and purchases, you give customers a reason to stay engaged and act. As you launch an email marketing program, consider setting up a mix of manual and automated email types.

Welcome emails

A great welcome email introduces customers to your business, and is a great opportunity to provide a discount code. Set it to automatically send the moment someone subscribes to your email list, when interest is highest and they’re most likely to purchase. It should be short and specific, and can be as simple as three main points: 

1. Welcome to [BUSINESS NAME]

2. Here's 15% off your first order: [CODE]

3. Shop here: [LINK]

Newsletters

An email newsletter is a type of email marketing campaign that provides useful content to your audience, all in the interest of growing your mailing list and building your brand. They’re typically sent once a month to keep customers informed, but not often enough to make them unsubscribe. They can start with a short update from the business, followed by two or three recent blog posts or products, and close with a single clear next step, like "Shop the new collection."

Product and sales announcements

Targeted email campaigns focus on specific new products or sales going on in your business. They have a set goal, and are built with a specific audience in mind. Focus on creating a compelling call to action, with clear messaging that works to drive conversion and a specific customer action. If your goal is to make a sale, make it easy and irresistible for them to follow through and buy from you.

Abandoned cart emails

An abandoned cart occurs when a shopper comes to your website and adds items to check out but doesn't actually finish paying for the purchase after a certain period of time. You can automatically send engaged potential customers like this an abandoned cart recovery email to give them a nudge to complete their purchase. These emails should have a clear call to action (CTA) to complete their purchase to try to convert them into paying customers. 

Winback emails

You can also use automated emails to encourage buyers to come back to make another purchase by offering a discount or other incentive. You can send a coupon to customers who recently purchased something from your online store, those who haven’t made a purchase in a while, or just to celebrate their birthday. Any of these could be the driver that a customer needs to come back and become a loyal regular.

Order updates

While not strictly traditional email marketing, giving customers updates on their orders helps maintain the relationship, build transparency, and funnel them into buying again. When a customer places an order, you’ll want to keep them informed about its progress. Having a set automated flow to provide them with status updates is key for transparency and customer satisfaction. This typically includes at least an order confirmation, delivery updates, and even a request for reviews and testimonials once they received their order.

What is automated email marketing?

Automated emails are messages that you design once, then set to send automatically when a customer hits a milestone or takes a specific action, like subscribing to your list, making a purchase, or abandoning a cart. Instead of writing and sending each message by hand every time, you build the email once, and customer behavior triggers it automatically. Welcome emails, abandoned cart reminders, winback offers, and order updates, all covered above, can each run as an automation.

For small business owners, automated emails can save time, and improve your customer experience by reaching customers at the moment they’re most likely to act.

Squarespace Email Campaigns has two key features that help you tailor your automated emails to the right audience: Trigger Filters and Conditions. With Trigger Filters, you can narrow down who enters an automation based on information that your leads include in their form submissions. For example, if you run a yoga studio, you can send a tailored email to leads who express interest in a specific type of yoga, like vinyasa. With Conditions, you can split your automation into two paths based on a yes/no question, like whether someone opened your last email or clicked a link. Engaged customers move down one path, while everyone else gets a different approach.

How do you choose an email marketing platform?

Look for a platform that fits three things: your list size, your technical comfort level, and how connected it needs to be to the rest of your site. Most platforms price based on contact count, so review how costs scale as your list grows, not just the starting price.

Automation and segmentation capabilities are useful, too. A platform that only sends one-off blasts limits you as your strategy matures. If you sell online, look for a tool that connects directly to your website and store, like Squarespace Email Campaigns, so customer and order data can help trigger automated messages without manual exports.

What should you include in a marketing email?

It’s important to take care of all of the details to make sure your messages stay compliant, reach your customers, and stand out. 

In the United States, the CAN-SPAM Act lays out the requirements that businesses must include in emails, with violations that can bring penalties of up to $53,088 per non-compliant email, according to the FTC. These requirements include a working unsubscribe option, an honest subject line that doesn't misrepresent the message, and accurate sender information so recipients know who's contacting them. 

Use an email address attached to a custom domain and define a clear sender name so your customer knows it’s relevant and the emails aren't sent to spam folders. A good subject line is short and specific about what's inside, rather than vague or gimmicky. Once someone opens the email, give them one clear action to take. An email that asks a reader to shop a sale, read a blog post, and follow you on social media all at once makes it harder for them to act on any single one. 

Your email design and content should align with your visual branding and audience strategy. For example, if you sell art or photography, you might start a graphics-heavy email that announces when new products are added to the site. A writer might decide to craft an email that includes links to recent work. Most email marketing platforms give you pre-designed templates or the tools to create templates from scratch.

Send yourself a test email before sending it to customers, as a way of implementing a quality assurance (QA) system. Use the test run to check the accuracy of your links, see your design and formatting in action, and assess the message from a user experience standpoint. 

How do you build an email list?

You should build your mailing list with existing and prospective customers, who have chosen to subscribe to your messages because they like your products, brand, or business. While it can take time, it’s a key part of marketing success. 

There are many ways to encourage mailing list sign-ups on your business website. Possible options include a dedicated newsletter sign-up area, creating a promotional pop-up, or adding a newsletter subscription option at checkout in your online store. You can offer customers a bonus or incentive, in exchange for sharing their email address. You can provide a discount or coupon toward a future purchase, early access to a sale, or an exclusive download.

Apps like Bio Sites by Squarespace make it possible to share multiple links in bio, including your newsletter sign-up, across your social media platforms. It's also easy to post calls for email sign-ups to increase awareness of your email marketing. You can even gather names and email addresses at in-person events and upload a CSV or spreadsheet of sign-ups. 

Whatever you do, avoid using shortcuts to grow your subscriber count, like buying lists of email addresses. This could backfire and cause internet service providers (ISPs) to flag your emails as spam, which can lead to blocklisting. This means your messages can be blocked from reaching their intended recipients. If and when you start collecting email addresses, be sure to review any applicable laws in your region.

Some subscribers will unsubscribe no matter how well-crafted your emails are. Ecommerce businesses typically see an average unsubscribe rate of 0.19% per send, according to Mailchimp’s email marketing benchmarks. If your unsubscribe rate climbs well above that average, treat it as a signal to revisit your strategy. Common culprits include sending too often, content that no longer matches what subscribers signed up for, or a list that includes people who never really wanted to hear from you. Slowing your send frequency and reviewing your content against what first got people to subscribe are good places to start.

Start small with email marketing

You don't need to immediately jump into running every tactic at once. Start with a simple way to grow your list, pick a platform that fits your business today, and send one welcome email or newsletter to see how your subscribers respond. Use what you learn to guide your next move.

From there, build gradually. Add a new automation, test a different subject line, or introduce segmentation once you have enough data to make it useful. You'll get the most out of email marketing by treating it as an ongoing relationship with your customers, not a one-time push.

Whichever stage you’re at, Squarespace Email Campaigns gives you the tools to build your list, design your emails, and set up automations as you grow.

Frequently asked questions

How much does email marketing cost for a small business?

Email marketing costs vary widely depending on your platform, plan, and list size, and pricing structures change often. Many providers offer low-cost tiers for smaller lists that scale into higher monthly fees as your subscriber count grows. Compare current plans directly with the provider you're considering, and expect costs to increase as your list expands past a few hundred or thousand subscribers, regardless of which platform you choose.

What's the difference between email marketing and marketing automation?

Email marketing typically means sending campaigns through a single channel, while marketing automation coordinates triggered messages across multiple channels, like email, SMS, and push notifications, based on customer behavior. For most small businesses just starting out, a strong email marketing platform covers what's needed before expanding into broader automation.

Is an unsubscribe link legally required in marketing emails?

Yes, an unsubscribe link is legally required in marketing emails sent in the United States, under the CAN-SPAM Act. If you have subscribers outside the United States, additional rules may apply. The EU's GDPR and ePrivacy rules, along with Canada's CASL, require similar consent and opt-out mechanisms, so review the requirements for any region where your subscribers are located.

Can you switch email marketing platforms without losing your subscribers? 

Yes, in most cases you can switch email marketing platforms while keeping your email list. You can export your subscriber list as a CSV file from most platforms, which you can then import into a new platform. The bigger risk is losing the automations, segments, and templates you've built, which usually need to be recreated from scratch.

What is a good email open rate for a small business?

A good starting email open rate benchmark is around 21–22%, the global average across industries, according to Litmus' State of Email report. Rates vary widely by industry and list quality, so track your own trend over time rather than chasing an absolute number.

Why are my marketing emails going to spam?

If emails that used to reach the inbox suddenly start landing in spam, check for a recent spike in bounced addresses or spam complaints, both of which can quickly damage your sender reputation. Removing inactive subscribers and slowing your sending pace can help rebuild it over time.

How do I know if my email marketing is working?

To know if your email marketing is working, track a few core metrics tied to your actual goal: open rate for attention, click-through rate for engagement, and conversions or revenue for real business impact. If your open rate is falling, revisit your subject lines; if clicks are low, revisit your content and call to action.

Is email marketing better than social media marketing?

Neither email marketing nor social media marketing is strictly better, as they serve different roles. Social media tends to be stronger for reaching new audiences and building awareness, while email tends to convert and retain existing customers more efficiently. Many small businesses use social media to grow their following and email to turn that audience into repeat customers.