Email marketing for small business: a step-by-step guide to getting started

Email is one of the few marketing channels a small business fully owns. Nobody can change the algorithm on your list, and every new subscriber is someone who asked to hear from you. You don't need a marketing team to make it work. You need a sensible tool, a domain that mailbox providers trust, a list built on consent, and a handful of automated emails that run in the background.

This guide walks through those steps in order. If you are a beginner, follow it top to bottom. If you already send a newsletter, skip to the automations and measurement sections.

Step 1: Choose an email marketing tool

Every tool can send an email. The differences that matter for a small business are how it charges you, what data it can see, and how much it does without you.

How to choose a tool: the criteria that matter

A few practical tips:

• Price the plan at your list size a year from now. Contact-based pricing looks cheap at 300 subscribers and less cheap at 8,000. Ask what happens when you go over a limit: does sending stop, or are you moved up a tier?
• Check whether automations are on the free or entry plan. Some tools gate flows behind a higher tier, and flows are where small lists earn their keep.
• Favour tools that read your sales data. An abandoned cart email needs to know what was in the cart. A "we miss you" email needs to know when someone last bought.

If you are weighing the well-known options, our side-by-side pages compare them on official pricing and features: Klaviyo vs Mailchimp and Mailchimp vs Brevo.

Step 2: Set up your sending domain and authentication

Send from an address on your own domain, such as [email protected]. A free-mail address like [email protected] sent through a marketing tool tends to fail authentication checks and land in spam.

Then publish three DNS records. Your email tool gives you the exact values; you paste them into your domain registrar or DNS host.

• SPF lists the services allowed to send mail for your domain.
• DKIM adds a cryptographic signature that proves the message wasn't altered and came from your domain.
• DMARC tells mailbox providers what to do when a message fails SPF and DKIM, and sends you reports.

A minimal DMARC record to start with looks like this:

_dmarc.yourshop.com  TXT  "v=DMARC1; p=none; rua=mailto:[email protected]"

p=none means "monitor only", so it won't block legitimate mail while you check everything is aligned.

This isn't optional any more. Google's sender guidelines require every sender to Gmail accounts to set up SPF or DKIM and to keep the spam rate reported in Postmaster Tools below 0.3%. Senders of more than 5,000 messages a day must use SPF, DKIM and DMARC and support one-click unsubscribe, and Google recommends keeping spam rates below 0.1%. Most small businesses are far below 5,000 a day, but meeting the bulk-sender rules from day one costs nothing and protects you as you grow. Our SPF, DKIM and DMARC guide walks through each record.

Step 3: Collect consent and grow your list

The quality of your list decides almost everything else. A small list of people who asked to hear from you beats a big list of people who didn't.

Where subscribers come from

• A signup form on your website, in the footer and on a dedicated page.
• A short popup or banner with a clear reason to join.
• A marketing checkbox at checkout, left unticked by default.
• In person: a QR code at the counter or on packaging that leads to the form.

Give people a reason to join. Example offer copy:

Rules to follow from day one

• Never buy or rent a list. Purchased addresses generate complaints and spam traps, and they can damage your domain's reputation for months.
• Use double opt-in where you can. A confirmation email filters out typos and fake addresses.
• Record consent: where and when each person signed up.
• Follow the law where your subscribers live. In the US, the FTC's CAN-SPAM compliance guide requires, among other things, honest headers and subject lines, a valid physical postal address, a clear way to opt out, and honouring opt-out requests within 10 business days. The FTC says each email in violation can bring penalties of up to $53,088. If you have subscribers in the EU or UK, the GDPR and related rules set stricter consent standards.

This section is general information, not legal advice. If you are unsure, check the official texts or ask a lawyer.

Step 4: Build your first 3 automations

Automations, also called flows, are emails triggered by something a person does. You set them up once and they run every day. For a small business with limited time, they usually matter more than any single campaign.

Klaviyo's 2026 benchmark report, based on over 183,000 of its customers, says flows generated nearly 41% of email revenue from just 5.3% of sends. Your numbers will differ, but the direction is consistent: emails that arrive at the right moment do more work per send.

Build these three first.

1. Welcome series (2–3 emails)

Triggered when someone subscribes. It sets expectations and turns interest into a first purchase or booking.

• Email 1 (immediately): deliver what you promised, such as the discount code, and say what they'll get from you and how often.
• Email 2 (day 2–3): your story, best sellers or most popular service, and why people choose you.
• Email 3 (day 5–7): social proof you genuinely have, such as real reviews, plus a reminder if the code is still unused.

Example subject lines:

2. Abandoned cart or checkout reminder

For online stores, this is the highest-intent email you will send. Triggered when someone starts a checkout and doesn't finish. A common pattern is a reminder after about an hour and a second one about a day later, stopping as soon as they order. Show the products they left, and keep the discount in reserve rather than training people to abandon carts.

If you don't sell online, swap this for an enquiry follow-up: someone requested a quote or booked a consultation and went quiet.

3. Post-purchase follow-up

Triggered by an order. Thank them, set expectations for delivery, share how to get the most out of the product, and a week or two later ask for a review. Later, add a cross-sell based on what they bought.

When these three are running, the next flows to add are browse abandonment and win-back. Our ecommerce email flows guide covers timing and copy for each.

Step 5: Set a sending cadence

Campaigns are the one-off emails you send to your list: new products, a seasonal sale, a story, a useful tip. The right frequency is the one you can sustain with emails people want.

A practical starting point:

• Start with one campaign a week or one every two weeks. Consistency matters more than volume; a list that hears from you every three months forgets who you are.
• Mix the content. Not every email should be a sale. Rotate between product news, how-tos, stories and offers.
• Send to engaged people more often than to inactive ones. Once you have a few months of data, create a segment of people who clicked or bought recently.
• Plan around your calendar. Holidays, launches and seasonal peaks need emails scheduled two to three weeks ahead.

A sample month for a small online shop:

Step 6: Measure what matters

Most tools show a dashboard full of numbers. These are the ones worth watching.

Be careful with open rate. Since Apple introduced Mail Privacy Protection in 2021, Apple Mail can load your email's images in the background whether or not the person reads it, which inflates opens. Use clicks and sales to judge results and to pick A/B test winners. Our email marketing benchmarks roundup explains what published reports say and how to read them.

Look at trends over months rather than single sends, and compare your flows against your campaigns. That tells you where the next hour of effort should go.

A 30-day launch checklist

• Week 1: choose a tool, connect your domain, publish SPF, DKIM and DMARC, add your postal address to the email footer.
• Week 2: put a signup form on your site and at checkout, write your welcome series, and turn it on.
• Week 3: turn on abandoned cart (or enquiry follow-up) and post-purchase flows; send your first campaign.
• Week 4: send a second campaign, review clicks, unsubscribes and complaints, and plan next month's calendar.

Where EterMail fits

EterMail is our product, an email marketing platform for ecommerce stores, SaaS products and apps. It includes ready-made welcome, browse abandonment, abandoned checkout, post-purchase and win-back flows, and it connects to Shopify through a read-only app, or takes contacts from hosted signup forms with double opt-in and CSV imports. AI learns your brand from your website and drafts the emails, and it can also make the pictures: on-brand banners, or scenes built from your real product photo, with an optional short greeting. A person on your team approves every campaign, and each flow before it starts running. Consent is re-checked at the moment of sending, and each contact gets at most one campaign per 24 hours (flow emails, which the person triggers, aren't capped).

The Free plan costs $0, needs no card, and includes 1,000 contacts and 1,000 credits a month; a marketing email costs 2 credits. See pricing for paid plans.

FAQ

Is email marketing worth it for a small business?

Usually, yes. You own the list, the cost per email is low, and automated emails like welcome and abandoned cart reminders keep working without extra effort. It works best when the list is built on consent and you send things people actually want.

How much does email marketing cost for a small business?

Many tools have free tiers for small lists, so you can start at $0. Paid plans are usually priced by number of contacts, number of emails sent, or both. Estimate your list size a year ahead and compare what each tool would cost at that size.

How do I start email marketing with no subscribers?

Start with the customers who already agreed to hear from you, such as past buyers who ticked a marketing box. Then add a signup form to your site and checkout, with a clear reason to join. Don't buy a list; it hurts deliverability and may break the law.

How often should a small business send marketing emails?

Start with one campaign a week or every two weeks and keep to it. Your automated flows send on top of that, triggered by each person's actions. Watch unsubscribes and complaints; if they rise, send less often or segment more.

Do I need permission to email my customers?

In the US, CAN-SPAM allows commercial email without prior consent but requires an opt-out, a postal address and honest content. In the EU and UK, marketing email generally needs consent. Either way, a permission-based list performs better. This is general information, not legal advice.

What should I look for in an email marketing tool?

Look at how it charges as your list grows, whether automations are on the plan you'd use, whether it connects to your store or app, and how easy it makes domain authentication. A good editor and ready-made flows matter more than a long feature list.