How to Start Email Marketing for a Small Business

You know you should be emailing customers. Every marketing guide says email has a strong return, and you have watched competitors fill slow weeks with a single newsletter. But you are not sure where subscribers come from, what to send first or why some businesses’ emails land in spam while others reach the inbox.

Here is the reality for 2026: getting started is easy, but the major inbox providers now enforce sender rules that used to be optional. Gmail, Yahoo and Microsoft Outlook all require authentication from bulk senders, and the mailbox providers reward businesses that send wanted email and punish those that do not.

This guide covers the 3 things that decide whether email marketing works for a small business: building a list the right way, writing a welcome sequence that does the selling for you and following the deliverability rules that keep you out of spam. For a week-by-week first-month calendar, see our companion guide on how to start email marketing.

Why email still matters for small businesses

Email is one of the few channels you own. Social platforms change their algorithms, ad costs rise and search results shift with AI answers. Your email list stays yours. If someone subscribed and your setup is sound, your message reaches their inbox without paying per view.

Email also works for almost any business: a bakery announcing weekend specials, a dentist sending recall reminders, a landscaper promoting spring cleanups or an online store recovering abandoned carts.

Step 1: Pick a platform and set up your domain

You need an email service provider (ESP), a platform built for marketing email. Well-known examples include Mailchimp, Klaviyo, Kit, MailerLite and Constant Contact. Most offer free or low-cost starter plans and charge more as your list grows. Compare features, contact limits and pricing models in our guide on how to choose an email marketing platform.

Do not send marketing email from a free Gmail or Yahoo address. Send from your own domain, such as news@yourbusiness.com, and set up 3 DNS records your ESP will walk you through:

• SPF lists the services allowed to send email for your domain.
• DKIM adds a cryptographic signature proving the message was not altered.
• DMARC tells inbox providers what to do when a message fails those checks and sends you reports.

Our SPF, DKIM and DMARC explainer covers each record in plain English.

Step 2: Build your list the right way

The quality of your list decides everything else. A small list of people who asked to hear from you beats a big list of strangers.

Where to collect subscribers:

• A signup form on your homepage, footer and blog posts
• A checkbox at online checkout (unchecked by default)
• A tablet or QR code sign-up at your counter or events
• Your booking or appointment system
• Social profiles with a link to your signup page

Give people a reason to join. “Subscribe to our newsletter” rarely works. Offer something specific: 10% off a first order, a seasonal checklist, early access to new products or a monthly local guide. Our guide on how to build an email list has more lead magnet ideas.

Never buy or rent lists. Purchased lists are full of people who never agreed to hear from you, plus old and fake addresses. They generate spam complaints and bounces that damage your sender reputation quickly.

Be clear at signup. Tell people what you will send and how often. Consider double opt-in, where subscribers confirm by clicking a link, if you get many fake or mistyped signups.

Key takeaway: Every address on your list should belong to someone who knowingly asked for your emails. That single rule protects your deliverability, keeps complaint rates low and keeps you on the right side of the law.

Step 3: Write a 3-email welcome sequence

A welcome sequence is a series of automated emails sent to every new subscriber. New subscribers are paying the most attention right after they sign up, so this is the most valuable email you will write. Set it up once and it works every day.

Tips for writing them:

• One goal per email. One main button or link.
• Short and personal. Write like you talk to customers at the counter.
• Mobile first. Many people read on phones, so use short paragraphs and large buttons.
• Plain subject lines. “Your 10% code is inside” beats clever wordplay.

Once your welcome sequence works, add other automations such as abandoned cart reminders and post-purchase follow-ups. See email automation workflows for small business.

Step 4: Follow the inbox providers’ sender rules

Starting in 2024, Gmail and Yahoo began enforcing stricter requirements for senders, and Microsoft followed for Outlook.com consumer addresses in May 2025. Most small businesses send far fewer than 5,000 emails a day, but following the bulk rules anyway is the safest way to reach the inbox.

Your ESP handles one-click unsubscribe headers for you. Your job is to add the DNS records, keep your list clean and watch complaints. Google Postmaster Tools and Yahoo Sender Hub show your domain’s reputation and spam rates once you send enough volume. Our email deliverability guide covers troubleshooting.

Step 5: Follow CAN-SPAM

The federal CAN-SPAM Act applies to commercial email in the US. According to the FTC’s compliance guide, you must:

• Use accurate “From,” “To” and “Reply-To” information and honest subject lines
• Identify the message as an advertisement where it is one
• Include a valid physical postal address, which can be a street address, a registered PO box or a registered private mailbox
• Explain clearly how to opt out, and honor opt-outs within 10 business days
• Keep your opt-out working for at least 30 days after each send
• Stay responsible even if you hire another company to send your email

The FTC says each separate email that violates the law can bring penalties of up to $53,088, a figure adjusted periodically for inflation. If you email people outside the US, other laws, such as Canada’s anti-spam law, may require express consent. This is not legal advice.

What to send after the welcome sequence

Once your sequence is live, send a regular campaign to your whole list. Start with every 2 to 4 weeks and keep the schedule you promised at signup. Simple formats that work for small businesses:

• Helpful tips tied to your expertise, such as seasonal maintenance or how to choose the right product
• New arrivals, menu changes or service updates
• Customer stories and behind-the-scenes looks
• Occasional offers, not in every email

Track opens cautiously, since privacy features in some email apps inflate open counts. Focus on clicks, purchases, bookings and unsubscribes. Add UTM parameters to links so your analytics show which emails drive sales.

Where to start this week

1. Choose an ESP with a free or starter plan that fits your list size.
2. Set up SPF, DKIM and DMARC for your sending domain with your ESP’s instructions.
3. Add a signup form to your website with a specific reason to join.
4. Import only contacts who agreed to receive marketing email.
5. Write and automate your 3 welcome emails.
6. Send yourself a test on Gmail, Outlook and a phone to check formatting.
7. Put your first campaign on the calendar for 2 to 4 weeks from now.

Conclusion

Email marketing for a small business comes down to 3 habits: build a list of people who asked to hear from you, welcome them with a short automated sequence and follow the authentication and unsubscribe rules that Gmail, Yahoo and Outlook now enforce. Get those right and every campaign you send after that starts with a real chance of reaching the inbox. Look up terms like DMARC and ESP in our glossary.

Sources

• Google Workspace Admin Help: Email sender guidelines — Gmail requirements for all senders and bulk senders, spam rate thresholds
• Yahoo Sender Hub: Sender best practices — Yahoo authentication, one-click unsubscribe and 2-day unsubscribe rule
• Microsoft Tech Community: Outlook’s new requirements for high-volume senders — Outlook.com requirements effective May 5, 2025
• FTC: CAN-SPAM Act compliance guide for business — CAN-SPAM requirements and penalties