5 Essential Emails Every Small Business Should Send

Last updated: April 2026 · Written by 20 Minute Marketing · 11 min read

Most small businesses struggle with email marketing not because they lack a list, but because they don’t know what to send. These 5 email types cover every stage of the customer relationship — and together they form a complete system that nurtures leads, converts prospects, and retains customers automatically.

The good news: you don’t need to reinvent the wheel each time you hit send. Certain email types consistently outperform others. Master these five and you’ll have a complete email marketing system that runs largely on autopilot.

Email 1: The Welcome Series

📘 Want the full picture? Read our small business email marketing — the complete pillar guide this article is part of.

Welcome emails achieve 4x higher open rates and 5x higher click rates than standard marketing emails. New subscribers are at peak interest the moment they sign up — your welcome series capitalises on that window.

A welcome series typically runs 5 emails over 10 days:

SPAM Act note: Under New Zealand’s SPAM Act 2003, every email must include your business name, a physical or postal address, and a functional unsubscribe link. Your welcome series must have these from email one.

Email 2: The Educational Newsletter

Regular educational emails build the trust and expertise positioning that makes every future promotional email land better. The formula that works for NZ small businesses: 90% useful, 10% promotion.

A simple newsletter structure that takes 20 minutes to write:

1. Local tip — something useful happening in your area or industry this week
2. The how-to — one specific, implementable piece of advice
3. Behind the scenes — a photo or story from your business that week
4. Soft CTA — one low-pressure invitation to enquire or learn more

Sustainable frequency for most NZ small businesses: weekly or fortnightly. Pick one and be consistent — predictability builds the habit of opening your emails. End every newsletter with a genuine question and “hit reply” — this keeps you in the primary inbox rather than Promotions.

Email 3: The Promotional Campaign

Promotional emails work best after trust has been established through your welcome series and newsletters. The moment you send a promotional email to a cold list is the moment your unsubscribes spike.

The proven structure for a promotional email that converts:

1. Hook — open with a problem or desire your reader recognises immediately
2. Solution — present your offer as the answer, focusing on outcome not features
3. Social proof — one specific customer result or review
4. Urgency — a genuine deadline or limited quantity (never fake urgency)
5. Clear CTA — one button, one action, no other links competing
6. Risk reversal — your guarantee or refund policy stated plainly

ACCC reminder: Under the Kiwi Consumer Law, any savings claim (“Was $300, now $150”) must be based on a genuine previous price held for a reasonable period. “Up to X% off” must represent the largest discount available, not a cherry-picked example.

Email 4: The Transactional Email

Transactional emails — order confirmations, booking confirmations, receipts, delivery notifications — have the highest open rates of any email type (often 60–80%) because the recipient is actively expecting them. Yet most small businesses treat them as pure admin and miss a massive opportunity.

Every transactional email should do three things:

1. Confirm the action — exactly what the customer expects (booking, order, payment receipt)
2. Reduce anxiety — clear next steps, what happens now, who to contact with questions
3. One gentle next step — a related product, a review request, a referral ask, or social follow

This post-job email is one of the highest-ROI automations available to any Kiwi service business. Set it up once and it works indefinitely. For the full review velocity strategy, see our Google reviews on autopilot guide.

Email 5: The Re-engagement Campaign

Every email list has inactive subscribers — people who signed up, engaged for a while, then went quiet. Sending to them hurts your deliverability without generating results. A re-engagement campaign either wins them back or cleanly removes them, improving your list health either way.

Run a re-engagement sequence when a subscriber hasn’t opened an email in 90+ days. Three-email sequence:

Anyone who doesn’t engage with this sequence should be removed or suppressed. A smaller, engaged list consistently outperforms a large, disengaged one — both for deliverability and revenue. For the full list hygiene process, see our email list cleaning guide.

Frequently Asked Questions

How often should I email my list as an NZ small business?

For most small businesses, a weekly or fortnightly educational newsletter plus automated welcome series, transactional emails, and occasional promotional campaigns is the right balance. The key is consistency over frequency — fortnightly every fortnight outperforms sporadic weekly sends.

What email platform should I use?

Mailchimp (free to 500 contacts), Klaviyo (best for eCommerce), and ActiveCampaign (best for service businesses needing CRM integration) are the strongest options for Kiwi SMBs. All comply with Kiwi Privacy Act requirements and the SPAM Act 2003.

Do I need to comply with the Kiwi SPAM Act for marketing emails?

Yes. The SPAM Act 2003 requires: explicit opt-in consent (no pre-ticked boxes), your business name and Kiwi address in every email, and a functional one-click unsubscribe in every email. ACMA enforces this and penalties are significant for repeat violations.