Using email best practices to promote products or services is essential for email campaign success, as it encourages customer loyalty and repeat engagement. With 4.48 billion users worldwide (Haan, 2024), email remains a powerful marketing tool across the buyer’s journey – boosting brand awareness, nurturing relationships, driving conversions and maintaining long-term customer engagement.
Best Practices
Email Content
Quality, personalised email content is essential. As inbox competition grows, emails must be engaging, relevant and tailored to audience needs. This approach strengthens relationships, nurtures leads, and boosts brand engagement which leads to greater customer loyalty, higher sales, better retention, and fewer unsubscribes (Bernatavičiūtė, 2025).
Using HTML emails 500-650 pixels wide enhances engagement and user experience by making content visual and interactive, helping them stand out. Email subject lines and body content should be targeted, concise and relevant – covering updates, offers, or personalised messages. Incorporate engaging visuals like GIFs or videos, use 2-3 consistent typefaces for readability and include links to your website, social media, landing pages, or relevant external content. Always conclude with a professional email signature.
Place a clear CTA above the fold for visibility, include an “opt-in” button for easy sharing and expanding reach and provide a visible “opt-out” option to comply with the Spam Act 2003 and build trust with subscribers (ACMA, no date).
Data Protection
Under the Privacy Act 1988, businesses must collect and use personal data responsibly for email marketing, with proper consent from users (business.gov.au, n.d.). Email permission must be obtained through trusted methods and not purchased lists. Data collected must be stored securely, kept accurate and up to date, and used only for the purpose specified.
Personal information includes names, signatures, addresses, email addresses, phone numbers, dates of birth, bank details, photos, videos, and IP addresses (business.gov.au, n.d.). Ignoring data protection and consent rules can harm your companies reputation and increase the chances of your emails flagged as spam.
Proofread Content
Always proofread before sending to your list. Reviewing grammar, spelling, tone and politeness ensures your message aligns with your company’s voice, formatting, and structure (Intuit Mailchimp, n.d.). Before campaign launch, send a test to check images/videos load, are responsive across devices and reflect any updates from your Email Service Provider (ESP). Look for broken or embedded links, verify blue links across devices and test in both HTML and plain text formats (Campaign Monitor, 2020).
Ensure your email is optimised for the preview panel and displays properly across different platforms. Finally, use tools like IsNotSpam.com to check whether your email is flagged as spam (Campaign Monitor, 2020). These steps help maintain professionalism and ensure deliverability.
Email segmentation
Email segmentation allows businesses to target the right customers by grouping subscribers based on shared traits. This prevents generic messaging, boosts relevance and reduces unsubscribe rates. Sending irrelevant emails can lead to disengagement and increased unsubscribe rates (Team A.E.C., n.d.). Segments examples include:
• Demographic – Age, gender, income, location, occupation
• Behavioral – Past purchases, browsing history, engagement levels
• Psychographic – Interests, values, lifestyle choices
• Lifecycle – Current stage in the buyer’s journey.
Having a proactive email strategy that follows best practices helps you reach and engage your target audience effectively, retain subscribers, add value, and ensure legal compliance.
Email Marketing Mistakes
Avoiding common email mistakes is essential to building a trusted and effective brand. Errors can damage your reputation, lower email deliverability, and make your business appear unprofessional. Here are three suggestions:
1. Using a “no-reply” email addresses block recipients from responding or asking questions, which reduces engagement and undermines customer trust. It also complicates the unsubscribe process, potentially violating regulations like the CAN-SPAM Act (Intuit Mailchimp. (2024). Ultimately, using a “no-reply” address leads to a poor user experience and can harm your brand’s reputation.
2. Purchasing email lists can trigger spam filters, leading to your emails being blocked or ignored. It can severely damage your brand’s reputation, result in low engagement and even violates data protection laws, making it a risky and ineffective marketing strategy (Webfx (2025).
3. Cleaning email lists. Failing to regularly clean you list and remove ‘unsubscribe’ emails can negatively impact your campaign’s success, reduce your return on investment (ROI), and wastes precious time and money. Keeping unsubscribed or inactive users on your list lowers deliverability, decreases effectiveness and increases the risk of spam complaints. Regular list maintenance is essential to improve performance, protect your sender reputation, and ensure higher campaign success.
These three practices reduce trust, lower engagement and can harm your sender reputation that leads to poor email performance and legal compliance issues.