A common practice in email marketing is to use images for everything in the email: graphics, illustrations, copy, links, and buttons. Although this can be efficient (slice, dice, and send it on its way), it’s another huge problem for subscribers relying on screen readers. The typical image-based email has a lot of information that can’t be parsed by a machine. What’s more is that a lot of email clients disable images by default, too.

And what’s more, a growing number of email readers are even voluntarily turning off images in their emails to reduce load time and improve email speed. Google recently revealed that 43% of Gmail users actually don’t read emails with background images on.