Module 03 of 11
Write Email People Open
The only channel you own outright. Three platforms, one welcome email you actually build, and the uncomfortable truth about subject lines.
- Estimated time
- 90 min
- Tools used
Mailchimp
Constant Contact
Klaviyo
Learning objectives
By the end of this module you will be able to:
- Explain why an email list is worth more than an equivalent social following.
- Choose the right type of email for a given moment in the customer lifecycle.
- Build a welcome email in a real platform and defend your subject line.
- Compare three email platforms and pick the one that fits your business.
- Name the main things that keep email out of the inbox.
Lesson
Email is the only marketing channel where you own the connection. A social platform can change its algorithm on a Tuesday and halve your reach; a search engine can reshuffle results and you find out from a graph. An email list is a file of addresses that belongs to you and works the same next year.
That ownership is also why it is the channel people most easily ruin. Nobody unfollows a search engine, but they will absolutely unsubscribe from you.
The types of email, and when each earns its place
- Welcome — sent immediately after someone signs up, while they still remember why. Consistently the highest-performing email you will ever send, and the one most businesses never set up.
- Newsletter — recurring, relationship-building, low direct return per send. Its job is to keep you in mind until the moment someone needs you.
- Promotional — a specific offer with a deadline. Effective in small doses; the fastest way to train people to ignore you in large ones.
- Transactional — order confirmations, receipts, password resets. Triggered by an action, opened at extraordinary rates, and almost always wasted as a chance to say one more useful thing.
- Re-engagement — sent to people who have gone quiet, asking directly whether they still want to hear from you. It shrinks your list, which is the point.
- Abandoned cart — a reminder that something is sitting unbought. The single highest-return automation in e-commerce.
Open rate is a symptom, not a goal
When an open rate falls, the instinct is to rewrite the subject line. Sometimes that is right. More often the problem is upstream, and the order to check things in is: are you reaching the inbox at all, are you sending to people who asked, are you sending at a useful frequency, and only then, is the subject line any good.
- Deliverability — authentication records (SPF, DKIM, DMARC), sending from a domain you control, and a clean list. Mail in the spam folder has an open rate of roughly zero and no subject line fixes it.
- List quality — addresses that opted in beat addresses you collected. Bought lists poison your sending reputation and take months to recover from.
- Frequency and expectation — people who were told "monthly" and get weekly do not open, they unsubscribe.
- Sender name — often more predictive than the subject. People open mail from a person they recognise.
- The subject line itself — specific and honest beats clever. It is the last thing to tune, not the first.
What makes a subject line work
A good subject line makes a specific promise the email keeps. "Your site went down twice last month — here is why" works because it is concrete, relevant and honest about the contents. "Big news inside!" fails on all three, and the cost of failing is not just this email — it is that the next one gets less benefit of the doubt.
The practical constraints: roughly forty characters survive on a phone, the preview text is a second line you control and most people waste, and anything that reads like a trick reads like spam to a filter as well as to a human.
Tools in this module
Mailchimp
Build Your First Welcome Email
Mailchimp is the default first email platform: generous free tier, a drag-and-drop editor, and enough automation to send a welcome message without paying anything.
Its strength is breadth — landing pages, forms, basic automation and reporting in one place. Its weakness is that the pricing gets steep as your list grows, and the e-commerce automations are shallower than a dedicated tool’s.
The welcome email is the highest-performing message in most accounts because it arrives while interest is at its peak. Building one end to end teaches you the whole platform: list, form, template, automation, send.
Your mission
Create a free Mailchimp account and build one simple welcome email template — the message someone gets the moment they sign up on your site. Write the subject line yourself rather than accepting the placeholder.
Open Mailchimp(opens in a new tab)What subject line did you write, and why? Say what specific promise it makes, and whether the email actually keeps it.
If you cannot name the promise in one sentence, the subject line is decoration.
Constant Contact
Compare a Second House Style
Constant Contact aims squarely at small businesses that do not employ a marketer: fewer options, more hand-holding, templates that assume a shop or a local service rather than a startup.
Comparing template libraries is a fast way to see what a platform believes its customers are. The defaults tell you who the tool is really for.
Every platform has a house style baked into its defaults, and most users never leave those defaults. Knowing what a tool nudges you toward tells you whether its output will look like your business or like every other business using it.
Your mission
Browse the Constant Contact email templates and compare them directly with the Mailchimp ones you just used. Look at density, imagery, button style and how much text the layout expects.
Browse the templates(opens in a new tab)How is their template style different from Mailchimp’s? Which of the two would need less fighting to look like something you would send?
Klaviyo
See What Automation Looks Like When It Is Serious
Klaviyo is built for e-commerce. Where Mailchimp offers automation as a feature, Klaviyo is organised around flows: sequences triggered by what someone did, or conspicuously did not do, in a store.
The canonical example is the welcome series — not one email but three or four over a fortnight, each branching on whether the last one was opened or acted on.
A flow is the difference between a mailing list and a system. Once messages are triggered by behaviour rather than by you remembering to write, email stops competing for your attention and starts working while you are asleep.
Your mission
Look at Klaviyo’s free plan and its pre-built e-commerce welcome series flows. Follow one flow through its branches and note where it decides to send a different message.
Open Klaviyo(opens in a new tab)Would Klaviyo or Mailchimp fit your business better, and why? Be specific about what you actually sell and how often someone would buy it twice.
Repeat purchases and cart abandonment favour Klaviyo. A newsletter and occasional announcements favour Mailchimp.
Assignment
Design one full email campaign for a fictional client
A local bicycle repair shop has just launched an online booking system. They have 400 email addresses collected at the counter over two years, and have never sent a single email to any of them.
Plan the campaign that introduces the booking system. Decide how many emails it takes, what each one is for, and in what order they go out. For at least one of them, write the subject line, the preview text and the opening two sentences in full.
- Name the type of each email in the sequence and the moment in the lifecycle it addresses.
- Say what you would do about a list of 400 addresses that has never been mailed — because sending to it cold is a deliverability decision, not just a marketing one.
- Decide which of the three platforms you would build it in, and justify it in one sentence.
Deliverable
A short written plan: the sequence, one email drafted properly, the list decision, and the platform choice with its reason.
Quiz
Match each situation to the type of email that belongs there.
Pick the matching item for each row.
- Someone just subscribed on your site and is still on the page
- A customer put three items in a basket and closed the tab
- Two hundred subscribers have not opened anything in a year
- You have a workshop with fifteen seats and it runs in ten days
Open rates on a monthly newsletter have dropped from 34% to 11% over four months. Nothing about the content changed. What do you check first?
Which of these subject lines is doing its job best?
Which of these genuinely damage your chances of landing in the inbox?
Select every answer that applies.
True or false: because of privacy features that pre-load images, open rate should now be treated as a rough trend rather than a precise measure.
If you started an email list this week for your own work, what would the welcome email say, and what would you promise about frequency?
The frequency promise is a contract. Promise what you will still be doing in a year, not what you feel like doing this month.
Score: 0 / 5
Recap
Before you move on, the things worth keeping:
- Email is the only channel you own outright, which is why list quality matters more than list size.
- Each email type answers a different moment: welcome, newsletter, promotional, transactional, re-engagement, abandoned cart.
- When opens fall, check deliverability, list quality and frequency before you touch the subject line.
- A good subject line makes a specific promise the email keeps; clever costs you trust the next time.
- Mailchimp is the broad starting point, Constant Contact is aimed at small local businesses, and Klaviyo is the serious choice once behaviour-triggered flows matter.