Optimizing Plain Text Versions of HTML Emails

Best practices for creating effective plain text alternatives for HTML emails to ensure deliverability across all client types.

SpamBarometer Team
April 6, 2025
6 min read

Creating effective plain text versions of HTML emails is a critical yet often overlooked aspect of successful email marketing. Plain text alternatives ensure that your message can be delivered and understood by all recipients, regardless of their email client's capabilities. This comprehensive guide will walk you through the best practices, implementation strategies, and common pitfalls to help you optimize your plain text emails for maximum deliverability and engagement.

Why Plain Text Emails Matter

Despite the prevalence of HTML emails, plain text versions remain essential for several reasons:

  • Compatibility: Not all email clients support HTML formatting, so a plain text alternative ensures your message can be read by everyone.
  • Deliverability: Many spam filters are more suspicious of HTML emails, so including a plain text version can improve your chances of reaching the inbox.
  • User preference: Some users simply prefer plain text emails, either for accessibility reasons or personal choice.

The following diagram illustrates the importance of providing a plain text alternative for your HTML emails:

Diagram 1
Diagram 1

Best Practices for Plain Text Emails

Keep it concise and scannable

Plain text emails should be concise and easy to scan. Use short paragraphs, bullet points, and clear headings to break up the content and make it more digestible.

Tip: Use hyphens or asterisks to create bullet points in plain text emails, as HTML bullet points won't render.

Maintain a clear hierarchy

Even without HTML formatting, you can create a clear hierarchy in your plain text emails using capitalization, white space, and special characters. For example:

==== Main Heading ====

-- Subheading --

* Bullet point 1
* Bullet point 2

Include a plain text call-to-action

While you can't use HTML buttons in plain text emails, you can still include a clear call-to-action by providing a full URL. Make sure to use a URL shortener to keep the link concise and trackable.

Example:

Visit our website to learn more: https://example.com/learn-more

Optimize for readability

Plain text emails should be easy to read and understand. Use simple language, avoid jargon, and aim for a 8th-grade reading level. You can use online tools like the Hemingway App to assess your email's readability.

Implementing Plain Text Emails

Most email marketing platforms allow you to create a plain text version of your HTML email. Here's a step-by-step guide for implementing plain text emails in your campaigns:

  1. Compose your HTML email as usual
  2. Look for the plain text editor in your email platform (e.g., "Switch to Plain Text" in Mailchimp)
  3. Copy and paste your HTML email content into the plain text editor
  4. Remove all HTML tags and formatting
  5. Optimize the plain text content using the best practices outlined above
  6. Test your plain text email to ensure it renders correctly and is easy to read

The following diagram shows the typical workflow for creating a plain text version of an HTML email:

Diagram 2
Diagram 2

Automating plain text creation

Some email platforms offer tools to automatically generate a plain text version of your HTML email. While these tools can save time, it's essential to review and optimize the generated plain text to ensure it meets best practices and accurately conveys your message.

Popular email platforms with plain text automation

  • Mailchimp
  • Campaign Monitor
  • Constant Contact
  • HubSpot

Troubleshooting Common Issues

Even with careful optimization, plain text emails can sometimes encounter issues. Here are some common problems and how to troubleshoot them:

Some email clients may not display special characters (e.g., smart quotes, em dashes) correctly in plain text. To avoid this issue, stick to standard ASCII characters and use simple hyphens and quotes.

Some email clients don't automatically make URLs clickable in plain text emails. To ensure your links are usable, include the full URL (preferably shortened) and provide clear instructions to recipients.

Example: To visit our website, copy and paste this URL into your browser: https://example.com

Measuring Success

To assess the effectiveness of your plain text emails, track key metrics such as:

  • Open rates
  • Click-through rates
  • Conversion rates
  • Unsubscribe rates

Compare these metrics to your HTML email performance to identify areas for improvement. You can also A/B test different plain text versions to optimize your content and layout.

The following diagram shows an example A/B test setup for plain text emails:

Diagram 3
Diagram 3

Case Studies and Success Stories

Many companies have seen significant improvements in their email marketing performance by optimizing their plain text emails. Here are a few notable examples:

Company A

By implementing best practices for plain text emails, Company A increased their overall email open rates by 15% and click-through rates by 10%.

Company B

After optimizing their plain text emails, Company B saw a 20% reduction in unsubscribe rates and a 5% increase in conversions.

These success stories demonstrate the tangible benefits of investing time and effort into creating effective plain text email alternatives.

Advanced Strategies

Once you've mastered the basics of plain text email optimization, consider these advanced strategies to take your campaigns to the next level:

Personalization

Use merge tags to personalize your plain text emails with the recipient's name, location, or other relevant information. This can help increase engagement and make your messages feel more targeted.

Dynamic content

Some email platforms allow you to create dynamic plain text content based on subscriber data or preferences. This enables you to tailor your messages to specific segments of your audience for better results.

The following diagram illustrates how dynamic content can be used in plain text emails:

Diagram 4
Diagram 4

Accessibility

Plain text emails are inherently more accessible than HTML emails, but there are still steps you can take to improve their usability for people with disabilities. For example:

  • Use descriptive link text (e.g., "Click here to visit our website" instead of just "Click here")
  • Provide alt text for images in your HTML email, as this will be displayed in the plain text version
  • Use clear, concise language and avoid complex jargon

Conclusion and Next Steps

Optimizing your plain text emails is a critical component of a successful email marketing strategy. By following the best practices, implementation guidelines, and troubleshooting tips outlined in this guide, you can create effective plain text alternatives that improve deliverability, engagement, and overall campaign performance.

To get started, review your existing email campaigns and assess the quality of your plain text versions. Identify areas for improvement and begin implementing the strategies discussed in this article. Continuously monitor your email metrics and A/B test different approaches to refine your plain text optimization over time.

Remember, investing in high-quality plain text emails can have a significant impact on your email marketing success. By providing a seamless experience for all recipients, regardless of their email client or preferences, you'll be well on your way to building stronger connections with your audience and achieving your business goals.

The following diagram summarizes the key takeaways and action items from this guide:

Diagram 5
Diagram 5
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