Email Marketing Still Works — Here's Why

Why email still works when other channels struggle

Social media reach is rented, not owned. A platform changes its algorithm and your posts reach a fraction of the people who once saw them, with no warning and no appeal process. An email list is different — once someone gives you their address, you can reach them directly, every time, for as long as they stay subscribed.

It is also remarkably cheap. Most email platforms charge based on list size, and for an SME with a few thousand contacts, the monthly cost is often less than a single day of ad spend — while typically producing a better return.

Building a list properly (not by buying one)

Buying an email list is both a poor idea and, in most cases, a PDPA violation. The people on it never agreed to hear from you, your emails will be marked as spam, and your sender reputation will suffer for every future campaign. Growth has to be earned, one genuine sign-up at a time.

Where sign-ups actually come from

• A simple sign-up form on your website — homepage footer and a dedicated page, not just buried in a menu.
• A useful incentive: a discount code, a helpful guide, or early access to new products.
• Checkout and enquiry forms, with a clear, separate opt-in checkbox for marketing emails.
• In-person events, pop-ups or your shop counter, using a simple tablet or QR code sign-up.
• Social media bios and posts linking directly to your sign-up page.

Practical example: a skincare brand offered 10% off a first order in exchange for an email address at checkout. Within six months their list grew from 200 to 3,000 contacts, and email became their second-highest revenue channel after direct search traffic.

Staying PDPA-friendly: consent done right

Singapore's Personal Data Protection Act (PDPA) requires clear consent before you send marketing emails, and it gives every recipient the right to opt out easily. Getting this right protects your business and, done well, actually improves your results — a list of people who genuinely want your emails will open and click far more than one padded with reluctant subscribers.

None of this is complicated once it is set up. Most reputable email platforms — Mailchimp, Klaviyo, Brevo and similar — have PDPA-appropriate opt-in and unsubscribe features built in by default.

Sequences: emails that work while you sleep

A sequence — or automation — is a set of emails triggered automatically by an action, rather than sent manually every time. This is where email marketing stops being a chore and starts producing consistent results with almost no ongoing effort.

Sequences every SME should have

You do not need all four on day one. A welcome series alone — three to four emails over the first two weeks — typically produces the biggest return for the smallest setup effort.

Subject lines that actually get opened

The subject line has one job: earn the open. Everything clever in the email itself is wasted if nobody opens it.

What tends to work

• Specificity over cleverness — "20% off ends Friday" beats "Don't miss this!!"
• Personal, conversational tone, as if written by a person, not a department.
• Curiosity paired with relevance — a genuine question the recipient wants answered.
• Keep it under about 50 characters so it does not get cut off on mobile.
• Avoid spam-trigger words like "FREE," excessive capitals, and multiple exclamation marks.

"Your aircon service is due next month" will consistently outperform "Time for a Check-Up!" — specificity reads as useful, cleverness reads as marketing.

Test two subject lines against each other occasionally, using whatever A/B feature your platform offers. Over time this teaches you more about your audience than any guide can.

How often to send without wearing out your welcome

There is no universal right frequency, but there are clear failure modes at both ends. Send too rarely and subscribers forget who you are, which shows up as spam complaints the next time you do email. Send too often with nothing of value and people unsubscribe or stop opening entirely.

• A general newsletter: once every two to four weeks is a safe, sustainable starting point.
• Promotional emails: no more than one or two a week, and only when there is a genuine reason.
• Transactional and sequence emails (order confirmations, welcome series): as needed, these do not count against your promotional cadence.
• Watch your unsubscribe rate — a spike after a particular email is a clear signal to adjust.

Consistency matters more than frequency. A predictable monthly email that people expect and open beats a sporadic burst of five emails in a week followed by three months of silence.

The metrics that actually tell you something

Most email platforms show a dozen metrics. For an SME, four matter most.

Track these over time rather than obsessing over any single send. A gradual upward trend in opens and clicks over several months is a far better signal than any one email's performance.

Common mistakes that quietly kill results

• Sending only when you want to sell something, never anything genuinely useful in between.
• No welcome sequence, so new sign-ups go quiet and forget why they subscribed.
• Writing for the whole list instead of segmenting — a customer and a first-time visitor rarely want the same email.
• Ignoring mobile formatting; most emails are opened on a phone first.
• No clear single call to action, leaving readers unsure what to do next.
• Never cleaning the list, so inactive addresses drag down open rates and sender reputation.

Practical example: a café sent a beautifully designed newsletter every week, but it was purely promotional. Open rates dropped steadily over three months. Switching to twice-monthly, with one useful tip or story per email alongside the offer, brought open rates back up within six weeks.