18 Principles of Accessible Emails That Ensure Everyone Can Read Your Messages

Try a quick experiment: turn on your phone's read-aloud feature and let it read the most recent promotional email you received. Chances are, an all-caps subject line will be read letter by letter, the "Buy Now" button will just be read as a "link," and your best product photo will remain completely silent.

That is the exact experience screen reader users face every day with business emails. And that is why email accessibility is no longer just a nice-to-have. When you design emails so that the most struggling users can read them, you naturally make them easier to read for everyone else.

Why Is Email Accessibility Worth Your Time?

There are some numbers that make me stop and think. Email marketing is often cited with an ROI of around $36 for every $1 spent. Nearly 90% of US users use email. And the global email marketing market is projected to reach $17.9 billion by 2027.

What makes email special is that it allows you to personalize your message and control almost the entire experience: who receives it, when they receive it, what they see, and where they click. But that control is only valuable if the recipient can actually access the content. A visually stunning email that is meaningless to a screen reader is still a failed email.

Who Actually Benefits When Emails Are Accessible?

The short answer: almost everyone. First are those using assistive technology — the visually impaired, people with low vision, individuals with dyslexia, and those unable to use a mouse. They are the ones hit hardest if you get this wrong.

But the list doesn't stop there. Readers checking email on their phones under harsh sunlight, older adults who need to zoom in, and tired readers who just want the main point in 5 seconds all benefit from the same principles: clarity, simplicity, and good contrast.

• Your emails reach more people, leaving no customer group behind.
• Your brand demonstrates genuine care, thereby increasing trust.
• A better reading experience translates to higher engagement and conversion rates.

Start With the Subject Line and Preview Text

This is the first part you should fix because it is quick and requires minimal effort. The subject line and preview text need to be short, clear, and accurately descriptive. If they are too long, they will be cut off on small screens, leaving the reader with a meaningless snippet.

Two very common mistakes to avoid: writing the entire subject line in all caps and overusing emojis. Capital letters cause some screen readers to mistake them for acronyms and spell out every single letter. Emojis get read as lengthy names, interrupting the flow of information mid-sentence.

A good subject line isn't a shock tactic. It's a subject line that lets readers immediately understand what they are about to open.

Content: Write Short, Write Clear, Don't Make Readers Guess

Write as if you are talking to a friend. Short sentences, short paragraphs, clear ideas. Avoid technical jargon and industry buzzwords, because your readers are under no obligation to understand your internal lingo. A simple test: if a 10-year-old child doesn't understand the sentence, rewrite it.

Your links need attention too. Don't leave the phrase "click here" standing alone, because screen readers might list all the links in an email, leaving the user listening to a series of identical phrases. Describe the destination instead, for example: "Download the email trends guide here."

A small but frustrating mistake: writing "see image below" in your copy. Screen reader users have no concept of "below"—they just hear a direction pointing into thin air. If the image is important, convey that information in text.

Color, Typography, and Layout

Contrast is the most important visual factor. The generally recommended threshold is 4.5:1 for small text and 3:1 for large text. This means either dark text on a light background or light text on a dark background—avoid the middle ground. White text on a black background remains the safest choice, and you can test this using tools like Contrast Ratio, Contrast Finder, Monsido, or Coolors.

Regarding typography, choose simple fonts and always have fallback options if you use custom fonts for special holiday emails. The ideal line length ranges between 45 and 75 characters, with a line height of about 1.5 times the font size. An easy-to-visualize example: 15pt font size, 25pt line height, 70 characters per line.

• Prioritize a single-column layout so readers can easily follow the order.
• Leave plenty of white space, as it gives the eyes a break and aids conversions.
• Use simple images, avoiding blinding effects.
• GIFs should not flash at a frequency of 2–55 Hz, as this can affect light-sensitive individuals.
• CTA buttons need to be large and easy to tap: a minimum of 44×44 px, while Google recommends 48×48 px, accompanied by strong contrast to stand out immediately.

The Technical Details That Determine the Real Experience

This section is for whoever codes the email, but content creators should also know it to collaborate effectively. First, emails need a logical reading order: from left to right, top to bottom. If the order is reversed, screen reader users will hear a jumbled story.

Second, use semantic tags for headings, paragraphs, and lists so screen readers can understand the structure and hierarchy of the content. Along with that come three small tasks with a big impact:

1. Ensure the email is fully navigable by keyboard, as not everyone can see a mouse cursor.
2. Declare the language attribute for the email, for example, mark French content as "fr" so the reader pronounces it correctly.
3. Set table roles to presentation, otherwise, screen readers will treat them as data tables and read out the HTML code—which means nothing to the recipient.

And don't forget alternative text for images. Alt text isn't for stuffing keywords, but for describing what the image conveys. If the image is purely decorative, mark it to be ignored instead of reading a meaningless string aloud.

So Where Should You Start?

Don't try to fix everything in one week, or you'll burn out halfway through. Pick a few small tasks and see them through to the end:

1. Take your last three emails, turn on a screen reader, and listen from start to finish.
2. Write down every spot that confuses you—that is your to-do list.
3. Check the text and background color contrast for your entire email template.
4. Rewrite your links to clearly show their destinations, dropping "click here" entirely.
5. Add an accessibility review step to your email approval workflow before sending.

What I love about this topic is that it doesn't require a massive budget. It requires attention. A clearer subject line, a more specific link, a sufficiently good contrast ratio—these small changes add up to an experience readers can feel, whether they use a screen reader or not.

What about you? In your inbox, are there any emails you've had to abandon because they were unreadable—the text too pale, the buttons too small, or the content too chaotic? Let me know in the comments. And if you found this article helpful, try applying just one tiny thing to your next email. Sometimes, a single well-placed change is all it takes to make a reader feel respected.