Nowadays, more web traffic continues to move to mobile. 59% of emails sent today are opened on mobile devices, and only 15% are opened on a desktop. Designing email campaigns for different-sized screens is essential for marketers in order to make the user experience as easy and intuitive as possible. This is where responsive design comes in.

Responsive email designs are about providing content that is customized for your user’s chosen device (mobile phone, tablet or desktop). With responsive design, you can send email templates that change depending on what screen size they are viewed. These emails will always render correctly regardless of the device they’re viewed on.
While the device screen size is the main factor that affects how a subscriber views an email marketing message, email clients should also be taken into consideration. The email client is the program that allows users to send and receive emails and manage an email account effectively (Gmail, Outlook…). Identify the top email clients on your market and prioritize adapting your emails for mobile to be read in these clients.
Use a responsive email editor so you don’t have to worry about things like media queries or CSS. The email builder will take care of those for you. However, there are other things that might interfere with the end result, which you should keep in mind:
Result
80% of people would delete an email that doesn’t display properly on their mobile device. Design responsive emails to offer a good user experience and improve your conversion rate.