Dark Mode in Mailpro is a built-in preview that shows how your newsletter will look in mail clients that switch to a dark theme. You design once, then check both the light and dark renderings before sending — logos stay readable, text keeps its contrast and white backgrounds don’t turn into glaring blocks.
What the dark mode preview catches
The four problems it surfaces fastest: a dark logo on a dark background that disappears, low-contrast body text where light grey on white turns into light grey on near-black, a CTA button that loses contrast and blends in, and hard-coded white containers that clash with the dark UI.
When to use it
Always — especially for transactional, branded or image-heavy newsletters. Open the dark mode toggle in the editor next to the desktop/mobile preview, then iterate. For a deeper background, see the definition of dark mode email.
Preview your campaign in dark mode
Enable the Dark Mode preview from the Mailpro Dark Mode feature, and read what is dark mode for design tips.