Several factors contribute to the legibility of a font in an email:
Font Size: A font size between 14px and 16px is generally recommended for body text. Font Type: Sans-serif fonts like Arial, Helvetica, and Verdana are considered more legible compared to serif fonts. Line Spacing: Adequate line spacing (around 1.5) can improve readability. Contrast: Ensure there is sufficient contrast between the text color and the background color.