Samsung Email

Samsung Email ships on all Samsung Android devices and uses a standard Android WebKit rendering engine with very minimal HTML sanitization. It is one of the most capable email clients — close to Apple Mail in terms of CSS and HTML support.

Rendering Engine

Samsung Email renders using Android’s WebKit/Chromium-based WebView. Unlike web-based clients (Gmail, Yahoo, Outlook.com), Samsung Email does not apply a server-side HTML sanitization pass — the email HTML is rendered largely as-is by the device’s engine.

This means most modern CSS works: flexbox, grid, animations, transforms, SVG, and media queries all function without stripping.

Mobile Viewport — 360px Default

Samsung Email typically renders in a 360px viewport (standard Android phone width). Unlike desktop clients with a fixed 600px container, your email must be genuinely mobile-responsive — not just scaled-down.

Fix: Use media queries or fluid percentage widths. A 600px fixed-width table-based email will be pinch-zoomed by default on Samsung Email.

/* Safe responsive pattern for Samsung Email */
@media screen and (max-width: 480px) {
  .email-wrapper { width: 100% !important; }
  .column { display: block !important; width: 100% !important; }
}

<style> in <head>

Supported. Unlike Gmail and Yahoo Mail, Samsung Email does not strip <style> from <head>. You can use class-based styles reliably. Media queries in <head> work.

Flexbox & Grid

Fully supported. Both flexbox and CSS grid work correctly in Samsung Email. You can use class-based or inlined flex/grid styles.

SVG

Supported. Inline SVG renders correctly. This makes Samsung Email one of the few mobile clients where SVG icons are safe to use.

Transitions & Animations

Partial support. CSS transitions and animations are parsed and may render, but behavior depends on the Android OS version. Use animations as progressive enhancement only — always ensure the static state looks correct.

CSS Variables

Partial support. CSS custom properties work on newer Samsung device OS versions (Android 9+), but are unreliable on older devices. For maximum compatibility, inline all values rather than relying on var().

Dark Mode

Samsung Email respects the device-level dark mode setting and fires prefers-color-scheme: dark media queries. Always test your email in dark mode — light-mode-only designs with hardcoded white backgrounds can look harsh on AMOLED displays.

@media (prefers-color-scheme: dark) {
  .email-body { background: #1a1a1a !important; }
  .email-text { color: #f0f0f0 !important; }
}

External Stylesheets

Not supported. <link rel="stylesheet"> is blocked. All styles must be inline or in <style> blocks.

Key Takeaways

One of the most capable clients — close to Apple Mail in CSS/HTML support
Design for 360px mobile viewport, not 600px desktop width
<style> in <head> is fully supported
Flexbox, grid, and SVG all work
Test in dark mode — Samsung devices fire prefers-color-scheme
CSS variables work on Android 9+ but avoid for max compatibility
No external stylesheets