Designing Emails That Convert – Best Practices

Email Marketing – Know Your Audience

Before you even think about design, get to know who you’re talking to. Segment your email list based on behaviour, interests, or demographics. A tailored message is far more likely to resonate than a one-size-fits-all approach.

Top tips:

• Use dynamic content to personalise offers and messaging.
• Match your tone and visuals to your audience’s expectations.
• Send at times that align with your audience’s habits.

Best Practices for Higher Engagement Emails

Designing emails that convert isn’t just about how they look — it’s about how they connect. Engagement is the bridge between visibility and action, and it’s built on a foundation of strategy, timing, and relevance. Here are the key best practices to help you boost engagement and get real results from your email campaigns:

Timing Matters

When your email lands in someone’s inbox can be just as important as what it says. Sending at the wrong time can bury your message beneath a pile of unread emails.

• Test different days and times to discover when your audience is most responsive. For B2B audiences, mid-morning on weekdays often performs well, while B2C audiences may engage more in the evenings or weekends.
• Know your audience and consider their working habits. If your recipients aren’t desk-based throughout the day, timing your emails for lunch breaks or the end of the day can increase the chances of engagement. Tailor your send times to align with when your audience is most likely to be available, based on their job roles.
• Consider where your users are located and the time zones they are in
• Use automated send-time optimisation tools if available in your email platform to tailor delivery to individual user behaviour.

Subject Lines That Spark Curiosity

Your subject line is your first impression — and your first hurdle. If it doesn’t grab attention, your email won’t get opened.

• Keep it short and punchy — ideally under 50 characters.
• Use curiosity, urgency, or a question to pique interest. For example: “Running low on stock – should we hold one for you?”
• Avoid spammy language (e.g. “FREE!!!” or “Act now!!!”) which can hurt deliverability.

Preview Text: Your Secret Weapon

Often overlooked, preview text is the snippet that appears next to or below the subject line in most inboxes. It’s your second chance to convince someone to open.

• Use it to add context or tease the content inside.
• Avoid repeating the subject line — instead, complement it with a benefit or call to action.
• Keep it concise and front-load the most important words.

Personalisation Beyond the First Name

Personalisation is more than just inserting someone’s name. It’s about making the content feel relevant.

• Use data like location, purchase history, or browsing behaviour to tailor content.
• Recommend products or content based on past interactions.
• Consider using dynamic blocks to show different content to different segments within the same email.

Design for Readability

• Using dark text on a light background is a best practice in email design. It enhances readability across devices and email clients, reducing compatibility issues. For most content, this approach should be the default.
• Use sentence case for most content, including buttons, to improve readability, especially on smaller screens. While it’s common to default to all caps for buttons, this can make text harder to scan quickly. Sentence case feels more natural, approachable, and less aggressive. That said, always consider your brand guidelines and test what works best for your audience.

Consistency Builds Trust

Your emails should feel like a natural extension of your brand. Consistency in design and tone helps build recognition and trust over time.

• Stick to your brand colours, fonts, and voice.
• Use consistent layouts so readers know where to find key information.
• Reinforce your brand identity with a recognisable sender name and logo.

Less is more when it comes to images

When it comes to email design, less is often more, especially with images. Including too many visuals can trigger ‘click to download image’ prompts, which disrupt the user experience and make your email look unpolished. For newsletter-style emails, it’s best to focus on compelling written content. On the other hand, product-focused emails can benefit from a single, well-designed lead image that grabs attention. Ultimately, the purpose of your email should guide its design.

Lead With Value

People are more likely to engage when they feel they’re getting something worthwhile.

• Offer exclusive content, discounts, tips, or early access.
• Make the benefit clear right away — don’t bury it halfway down the email.
• Avoid overly salesy language. Focus on how your message helps the reader, not just what you want them to do.

By combining these engagement strategies with thoughtful design and audience insight, you’ll create emails that not only get opened but inspire action. Remember, engagement is earned through relevance, clarity, and value.

Email Design for Readability and Flow

Even the most compelling content can be lost if your email isn’t easy to read. Most recipients won’t read every word — they’ll scan for key points, headlines, and calls to action. That’s why designing for readability and flow is essential to keeping your audience engaged and guiding them toward conversion. Here are some key design tips for better readability:

Use a Clear Visual Hierarchy

Structure your content so that the most important information stands out at a glance.

• Headlines should be bold and concise, drawing attention to the main message.
• Subheadings help break up content and guide the reader through the email.
• Short paragraphs (2–3 lines max) make the content easier to digest.

Think of your email like a landing page — each section should naturally lead to the next.

Break Up Text with Bullet Points or Icons

Large blocks of text can be intimidating. Use bullet points or icons to:

• Highlight key benefits or features
• Summarise complex information
• Make your content more scannable

For example:

• ✅ Easy to use
• ✅ Fully responsive
• ✅ Backed by expert support

This approach helps readers quickly grasp the value of your message.

Choose Legible Fonts and Maintain Strong Contrast

Typography plays a huge role in readability. Stick to web-safe, easy-to-read fonts like Arial, Helvetica, or Roboto.

• Use a minimum font size of 14px for body text.
• Ensure sufficient contrast between text and background — dark text on a light background is usually best.
• Avoid using too many font styles or colours, which can be distracting.

Also, make sure your text is left-aligned — it’s easier to read than centred or justified text, especially on mobile.

Design with Mobile in Mind

Readability on mobile devices is critical. Use a single-column layout, keep text blocks short, and ensure buttons and links are easy to tap.

Test your email on multiple devices and screen sizes to ensure a smooth reading experience across the board.

Use Visual Cues to Guide the Reader

Incorporate design elements like:

• Dividers to separate sections
• Whitespace to give content room to breathe
• Directional cues (like arrows or icons) to draw attention to CTAs
• These subtle touches help create a natural flow and keep the reader moving through your content

Mobile-First Email Design

With over 60% of emails opened on mobile devices, designing for mobile is no longer a nice-to-have — it’s a must. A mobile-first approach ensures your emails are accessible, readable, and actionable on smaller screens, where attention spans are shorter and user expectations are higher.

Here’s how to get it right:

Use Single-Column Layouts

Multi-column layouts may work well on desktops, but they often become cluttered or unreadable on mobile devices. A single-column layout ensures your content flows naturally and is easy to scroll through.

Why it matters:

• Prevents horizontal scrolling, which frustrates users
• Ensures content stacks vertically in a logical order
• Simplifies the design, making it easier to focus on key messages

Best practice:

• Keep your email width between 320–480 pixels and use generous padding to avoid cramped content.

Ensure Buttons Are Large Enough to Tap

On mobile, users interact with their thumbs, not a mouse. Small or closely spaced buttons can lead to accidental clicks or missed opportunities.

Why it matters:

• Improves usability and reduces friction
• Encourages more clicks by making CTAs more accessible
• Enhances the overall user experience

Best practice:

• Make buttons at least 44×44 pixels, with plenty of space around them. Use high-contrast colours and clear, action-oriented text like “Shop Now” or “Download Free Guide”.

Keep Subject Lines and Preheaders Short for Smaller Screens

Your subject line and preview text are the first things a user sees — and on mobile, space is limited. If your message cuts off, you risk losing the reader’s attention before they even open the email.

Why it matters:

• Maximises visibility in mobile inboxes
• Increases open rates by delivering a clear, compelling hook
• Helps your message stand out in a crowded inbox

Best practice:

• Keep subject lines under 35–40 characters
• Use preview text to complement the subject line, not repeat it
• Front-load important words so they appear even if the text is truncated

Test Across Devices and Email Clients

What looks perfect in one inbox might break in another. Testing makes sure your email looks good on different devices, screen sizes, and email programs your audience might use.

Why it matters:

• Prevents broken layouts or unreadable content
• Ensures consistent branding and user experience
• Helps identify issues before they impact performance

Best practice:

Use tools like Litmus, Email on Acid, or your email platform’s preview feature to test:

• iOS and Android devices
• Gmail, Outlook, Apple Mail, and other major clients
• Both dark mode and light mode settings

By following these mobile-first principles, you’ll ensure your emails are not only visually appealing but also functional and effective, no matter where your audience is reading them.

Visual Elements That Support the Message

Images, icons, and GIFs can enhance your message — but only when used strategically.

Best practices:

• Use visuals to reinforce, not replace, your message.
• Always include alt text for accessibility.
• Compress images to reduce load times.
• Maintain brand consistency in style and colour palette.

Crafting CTAs That Convert

Your call-to-action (CTA) is the bridge between engagement and conversion. Make it count.

CTA tips:

• Use action-oriented language: “Download now”, “Get your free trial”, “See how it works”.
• Make buttons stand out with contrasting colours.
• Limit to one primary CTA per email to avoid confusion.
• Place CTAs where they’re easy to find — ideally above the fold and again at the end.

Test, Optimise, Repeat

Even the best-designed emails can benefit from testing and refinement.

What to test:

• Subject lines and preview text
• CTA wording and placement
• Layouts and image use
• Send times and frequency
• Use A/B testing to compare variations and track metrics like open rate, click-through rate, and conversion rate. Let the data guide your next move.

Compliance and Deliverability

Designing for conversion also means ensuring your emails reach the inbox — and stay compliant.

Key considerations:

• Follow GDPR rules for consent and data handling.
• Avoid spammy language and excessive punctuation.
• Include a clear unsubscribe link.
• Use accessible design: readable fonts, sufficient colour contrast, and screen reader-friendly layouts.

Design Smarter Emails. Achieve Better Results.

Great email design drives action. Know your audience, follow best practices, and keep testing.

Need help? Contact Molokini — we’re here to make your emails work harder.