Designing letters requires attention to many details.

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Make the layout of the letter attractive
Once you have a strategy and a subject line that will get your email opened, you're ready to focus on a design that will truly engage your audience.

Mobile responsiveness: More than 40% of all email opens happen on mobile devices. Another 40% happen on webmail. You can’t ignore these customers and should start with a mobile design that works well on smartphones.
Consistent with your brand: Emails should be easily recognizable belgium phone number list as part of your brand. Use colors and fonts that match your style and what the customer sees on your other platforms. Maintain a professional appearance so customers can trust you.
Use “air”: Try not to overload the letter. Allow elements to breathe by leaving white space. When design elements constantly merge with each other, it is more difficult for the client to perceive the information.
Clear Hierarchy of Information: Show the reader what’s most important in the email. Use headings, subheadings, and colors that direct the eye. Make sure the call to action (CTA) is prominent and clear so the user knows what the next step is.