Your carefully written email may be interpreted by software before a customer ever sees it. This generation of AI-powered inbox features can summarise messages, sort priorities and help people decide what deserves their attention. The practical lesson for your business is simple: every email needs to make its purpose and value obvious while still sounding human, relevant and trustworthy.
This blog post is adapted from information shared in a keynote speech delivered by entrepreneur, technologist and thought-leader, Musa Kalenga, at the Inbox Effect event, hosted by Everlytic in July 2026.
Write Every Email for Two Different Readers
Every marketing email now has two potential readers. The human reader asks, “Is this useful to me?” The machine reader looks for signals that explain the message’s intent, structure and likely relevance.
Clear writing serves both. Make the subject line, preview text and opening sentence reinforce one central idea. Put the most useful information first and guide the reader towards one primary action.
Compare these approaches:
Vague: “Something exciting is coming!”
Clear: “Your winter service reminder: book by Friday and choose your preferred time.”
The second version explains why the message matters and what to do next. It is also easier for an automated system to summarise accurately.
Start with the Customer’s Situation, Not the Sending Tool
Technology can scale a good communication strategy, but it cannot rescue a message that has no clear value. Before choosing an email template, automation or send date, work through three questions:
Empathy: What is this customer experiencing, trying to achieve or trying to avoid?
Persuasion: What useful promise, proof or information would help them make a decision?
Technology: What data, trigger or automated journey can deliver the message at the right moment?
This empathy-first sequence works for businesses of every size. A retailer might recommend a replacement product, while an accountant might explain what a client should prepare for a deadline. When the customer’s need shapes the campaign, the email has a reason to exist.
Personalise Messages around Behaviour
Adding a first name can make an email feel warmer, but meaningful personalisation comes from paying attention to what a customer does and what they have asked to receive.
- Useful signals may already exist in your business, including:
- Products or services viewed
- Links clicked in earlier emails
- Purchases, bookings or enquiries
- Renewal or replenishment dates
- Topics and channels the customer selected
- Signs that engagement has slowed
Choose one behaviour linked to a business outcome. To increase repeat purchases, for example, identify customers who bought once but have not returned within the normal buying cycle. Send a helpful reminder or relevant recommendation rather than the same promotion to your entire database.
Keep the rules proportionate and transparent. Honour consent, communication preferences and unsubscribe requests, and confirm how the Protection of Personal Information Act (POPIA) applies to your data and campaigns with your legal or privacy adviser.
Smarter database segmentation can help you turn broad campaigns into targeted customer communication. See how to use segmentation to make every message more relevant.
Build One Responsive Customer Journey
Scheduled newsletters still have a place, but a customer relationship cannot rely on the calendar alone. Behaviour-triggered communication responds to what a person has done, where they are in the customer lifecycle and what would help them next.
Start with one high-value moment, such as a new enquiry, first purchase, upcoming renewal or period of inactivity. Then:
- Define the trigger and the data source
- Choose the most useful response
- Set delays, frequency limits, exclusions and stop conditions
- Measure what happens and improve the next version
Imagine that a prospective customer requests a quote. The first email confirms the request and sets expectations. A follow-up can respond to the service they viewed, while the sequence pauses if they call your team.
That is what good automation should achieve: communication that responds to the relationship instead of simply increasing message volume.
Marketing automation can help you respond to customer behaviour at the right moment without the manual effort. Discover how to build automated journeys that have customer relevance.
Use the INBOX Framework Before You Send
The INBOX framework turns good intentions into a repeatable process:
Intent: Define the audience, trigger and value of the message in one sentence.
Nurture: Connect the email to a wider customer journey.
Brand: Keep the voice recognisably yours, even when AI helps generate or test copy.
Own: Protect consent, preferences, data quality and trust.
eXposure: Front-load the value and use a clear structure that people and machines can understand quickly.
Use these checks while briefing and writing the campaign. A weak purpose is easier to fix at the start than just before sending.
Measure Meaningful Customer Action
Open rates can offer directional information, but privacy features, automated scanning and AI-assisted inbox behaviour can affect whether an “open” reflects genuine human attention.
Focus on measures closer to a business result: clicks, replies, quote requests, bookings, purchases, renewals and behaviour over time. A lower open rate with more qualified enquiries may be more valuable than a high open rate that produces no action.
Make Relevance a Business Habit
Smarter inboxes do not reward more communication. They reward communication that is clear, timely, useful and trusted. The opportunity for business owners is to turn those qualities from good intentions into consistent practice.
Start with one change you can measure. Review three emails. Build one journey around customer behaviour. Replace one broad campaign with a more relevant segment. Then pay attention to what happens next.
Every open, click and response is a signal. Use those signals to sharpen the next message, strengthen the next journey and build a communication strategy that becomes more relevant with every send.
Make Every Email Easier to Understand and Harder to Ignore
AI is changing what happens to your email before a customer even opens it. The Inbox Effect takes a deeper look at this shift and what marketers can do to stay relevant as inboxes become smarter.
Get the guide for practical insights on writing for two readers, improving relevance and building customer journeys that earn attention.
Frequently Asked Questions
Does AI Read Every Marketing Email?
No. Inbox providers and features vary. However, AI-powered summarisation, filtering and prioritisation are becoming more common, so clear intent and structure are increasingly important.
Do Small Businesses Need Advanced Technology to Use this Approach?
No. Start with one customer segment and one trigger, such as a new enquiry, purchase or renewal date. Add complexity once you have a clear need and reliable data.
Is Using a Customer’s First Name Enough Personalisation?
No. A first name shows that you hold a piece of data; behaviour-based personalisation responds to a customer’s current interest, action or stage. That usually makes the message more useful.
How does POPIA Affect Behaviour-Based Email Marketing?
POPIA requires responsible handling of personal information. Use an appropriate lawful basis, respect consent and stated preferences, keep data secure and make opting out straightforward. Seek qualified legal advice for your specific circumstances.
Where Should a Business Owner Start?
Review the subject line, preview text and first 200 characters of one recent campaign. If the value and purpose are unclear, rewrite that opening before changing anything else.
